
729 N.W.2d 898 (2006)
273 Mich. App. 187
MORRIS PUMPS, a division of Yeomans Chicago Corporation, Plaintiff-Appellee,
v.
CENTERLINE PIPING, Inc., Defendant, and
EBI-Detroit, Inc., a/k/a EBI Detroit, Inc., Defendant-Appellant.
R. Vander Lind & Son, Inc., and Chemineer, Inc., Plaintiffs-Appellees, and
Robbins & Meyers, Inc., Plaintiff,
v.
Centerline Piping, Inc., Defendant, and
EBI-Detroit, Inc., a/k/a EBI Detroit, Inc., Defendant-Appellant.
Docket Nos. 268717, 268718.
Court of Appeals of Michigan.
Submitted December 5, 2006, at Detroit.
Decided December 12, 2006, at 9:00 a.m.
Released for Publication March 14, 2007.
*901 Thomas M. Keranen & Assoc., P.C. (by Peter J. Cavanaugh), Bloomfield Hills, for Morris Pumps.
Oade, Stroud & Kleiman, P.C. (by Ted W. Stroud and Sean P. McNally), East Lansing, for R. Vander Lind & Son, Inc.
Ronald B. Rich & Associates (by Ronald B. Rich), Farmington Hills, for Chemineer, Inc.
Poling, McGaw & Poling, P.C. (by D. Douglas McGaw), Troy, for EBI-Detroit, Inc.
Before: JANSEN, P.J., and SAWYER and BANDSTRA, JJ.
JANSEN, P.J.
In these consolidated cases, defendant EBI-Detroit (defendant) appeals by leave granted the trial court's grant of summary disposition on the issue of liability in favor of plaintiffs Morris Pumps; R. Vander Lind & Son, and Chemineer, Inc. (plaintiffs).[1] We affirm.

I. Facts
The facts underlying these consolidated cases are essentially undisputed. The city of Detroit contracted with defendant, as general contractor, to construct a $28 million wastewater treatment facility in St. Clair County, Michigan. As required under its general contract and the public works bonding act (PWBA), MCL 129.201 et seq., defendant furnished performance and payment bonds for the construction project.
Defendant subcontracted with Centerline Piping, Inc., to complete the mechanical portion of the construction project. The subcontract between defendant and Centerline totaled more than $3.3 million. In order to complete the subcontract, Centerline was required to contract with several material suppliers for the provision of equipment and supplies. Each of these suppliers, including plaintiffs, separately contracted with Centerline to provide various equipment and materials in exchange for payment.[2] Plaintiffs timely delivered the equipment and supplies required under their respective contracts with Centerline. However, Centerline never paid plaintiffs.
In July 2004, not long after plaintiffs had made delivery to Centerline under their respective contracts, Centerline apparently went out of business and abandoned *902 the construction project.[3] Defendant therefore terminated Centerline as a subcontractor and retained a replacement contractor to finish the mechanical portion of the project. The replacement contractor used the equipment and materials, which had been previously delivered by plaintiffs and which was already present on the construction site, to finish the job. Because the materials had already been present on the site when the replacement contractor was retained, the replacement contractor did not bill defendant for the items. Neither defendant nor the replacement contractor ever paid plaintiffs for the equipment and materials ultimately used to complete the construction project.
R. Vander Lind & Son sent notice that it intended to assert a claim against defendant's payment bond. However, the notice was untimely under the PWBA. It is undisputed that R. Vander Lind & Son would have been entitled to reimbursement in the amount of $169,425 had it properly and timely pursued its claim against the payment bond. It is unclear whether Morris Pumps and Chemineer ever attempted to assert claims against the payment bond.
R. Vander Lind & Son and Chemineer filed suit, asserting a breach of contract claim against Centerline and an unjust enrichment claim against defendant.[4] In a separate action, Morris Pumps sued Centerline and defendant as well, similarly asserting a breach of contract claim against Centerline and an unjust enrichment claim against defendant.[5] On January 21, 2005, the trial court consolidated the two cases pursuant to MCR 2.505.
Pursuant to MCR 2.116(C)(10), plaintiffs moved for partial summary disposition with respect to their unjust enrichment claims against defendant. Noting that Centerline had "[a]pparently . . . gone out of business," the trial court granted summary disposition with respect to liability in favor of R. Vander Lind & Son and Morris Pumps. The trial court ruled that despite the availability to plaintiffs of alternative relief by way of the payment bond, defendant had been unjustly enriched when it retained and used without paying the equipment and materials delivered by plaintiffs. Thereafter, the trial court denied defendant's motion for reconsideration and amended its judgment to grant summary disposition with respect to liability in favor of Chemineer, as well. The court reserved for a later date the calculation of plaintiffs' specific recovery amounts. The court noted that it would continue to consider the proper amounts of recovery, and might take proofs regarding plaintiffs' losses at a later time.
Defendant sought leave to appeal the grant of partial summary disposition in favor of plaintiffs on the unjust enrichment claims. We granted defendant's applications.

II. Standard of Review
We review de novo a trial court's decision on a motion for summary disposition. Dressel v. Ameribank, 468 Mich. 557, 561, 664 N.W.2d 151 (2003). MCR 2.116(C)(10) provides for summary disposition if there is no genuine issue with respect to any material fact and the moving party is entitled *903 to judgment as a matter of law. When deciding a motion for summary disposition under subrule C(10), a court must consider the entire record in a light most favorable to the nonmoving party. Corley v. Detroit Bd. of Ed., 470 Mich. 274, 278, 681 N.W.2d 342 (2004). Review is limited to the evidence presented to the trial court at the time the motion was decided. Peña v. Ingham Co. Rd. Comm., 255 Mich.App. 299, 313 n. 4, 660 N.W.2d 351 (2003). The content or substance of the evidence proffered must be admissible. Maiden v. Rozwood, 461 Mich. 109, 123, 597 N.W.2d 817 (1999). A genuine issue of material fact exists when the record leaves open an issue on which reasonable minds could differ. West v. Gen. Motors Corp., 469 Mich. 177, 183, 665 N.W.2d 468 (2003).
Whether a specific party has been unjustly enriched is generally a question of fact. See Dumas v. Auto Club Ins. Ass'n, 168 Mich.App. 619, 637, 425 N.W.2d 480 (1988), rev'd on other grounds 437 Mich. 521, 473 N.W.2d 652 (1991); see also Hayes-Albion Corp. v. Kuberski, 421 Mich. 170, 186, 364 N.W.2d 609 (1984). However, whether a claim for unjust enrichment can be maintained is a question of law, which we review de novo. Liggett Restaurant Group, Inc. v. Pontiac, 260 Mich.App. 127, 137, 676 N.W.2d 633 (2003). Finally, we review de novo a trial court's dispositional ruling on an equitable matter. Blackhawk Dev. Corp. v. Village of Dexter, 473 Mich. 33, 40, 700 N.W.2d 364 (2005).

III. Analysis
Our Supreme Court "has long recognized the equitable right of restitution when a person has been unjustly enriched at the expense of another." Michigan Ed. Employees Mut. Ins. Co. v. Morris, 460 Mich. 180, 198, 596 N.W.2d 142 (1999) (MEEMIC). "Even though no contract may exist between two parties, under the equitable doctrine of unjust enrichment, `[a] person who has been unjustly enriched at the expense of another is required to make restitution to the other.'" Id., quoting Kammer Asphalt Paving Co. v. East China Twp. Schools, 443 Mich. 176, 185, 504 N.W.2d 635 (1993) (citation omitted).

A. Existence of Express Contracts
Defendant first argues that plaintiffs' unjust enrichment claims against it were barred by the existence of express contracts executed between plaintiffs and Centerline, which covered the same subject matter. We disagree.
It is true that Centerline had express contracts with plaintiffs concerning the supplies and materials that plaintiffs agreed to furnish. However, the mere existence of these express contracts between plaintiffs and Centerline was not sufficient to bar plaintiffs' unjust enrichment claims against defendant, with which plaintiffs had no express contractual relationships.
The theory underlying quantum meruit recovery is that the law will imply a contract in order to prevent unjust enrichment when one party inequitably receives and retains a benefit from another. Martin v. East Lansing School Dist., 193 Mich.App. 166, 177, 483 N.W.2d 656 (1992). "However, a contract will be implied only if there is no express contract covering the same subject matter." Belle Isle Grill Corp. v. Detroit, 256 Mich.App. 463, 478, 666 N.W.2d 271 (2003). "Generally, an implied contract may not be found if there is an express contract between the same parties on the same subject matter." 42 CJS, Implied and Constructive Contracts, § 34, p. 33 (emphasis added).
Turning to the case at bar, we recognize that there existed express contracts between plaintiffs and Centerline, all of *904 which concerned the subject matter at issue here. Thus, we agree with defendant that there were express contracts covering the same subject matter. However, defendant was not a party to any of these express contracts. Thus, the contracts did not exist between the same parties. Because there were no express contracts between the same parties on the same subject matter, id., defendant's argument with respect to this issue must fail. The mere existence of the express contracts between plaintiffs and Centerline does not bar recovery from defendant in quantum meruit.

B. Inequitable Retention by Defendant
Defendant next argues that plaintiffs cannot maintain their claims for unjust enrichment because it did not "unjustly" or "inequitably" retain the materials and equipment that had been delivered by plaintiffs. We disagree.
"`The essential elements of a quasi contractual obligation, upon which recovery may be had, are the receipt of a benefit by a defendant from a plaintiff, which benefit it is inequitable that the defendant retain.'" MEEMIC, supra at 198, 596 N.W.2d 142 quoting Moll v. Wayne Co., 332 Mich. 274, 278-279, 50 N.W.2d 881 (1952). Thus, in order to sustain a claim of quantum meruit or unjust enrichment, a plaintiff must establish (1) the receipt of a benefit by the defendant from the plaintiff and (2) an inequity resulting to the plaintiff because of the retention of the benefit by the defendant. Barber v. SMH (US), Inc., 202 Mich.App. 366, 375, 509 N.W.2d 791 (1993). In other words, the law will imply a contract to prevent unjust enrichment only if the defendant has been unjustly or inequitably enriched at the plaintiff's expense.
Defendant contends that it was not unjust or inequitable for it to retain and use the materials delivered to the construction site by plaintiffs. Defendant asserts that just because it was enriched, it does not necessarily follow that the enrichment was unjust. Defendant suggests that because the materials were simply left behind at the construction site by Centerline, it was entitled to use the items to complete the construction project.
We agree with defendant that not all enrichment is necessarily unjust in nature. In general,
[a] third party is not unjustly enriched when it receives a benefit from a contract between two other parties, where the party benefited has not requested the benefit or misled the other parties. . . . Otherwise stated, the mere fact that a third person benefits from a contract between two other persons does not make such third person liable in quasi-contract, unjust enrichment, or restitution. Moreover, where a third person benefits from a contract entered into between two other persons, in the absence of some misleading act by the third person, the mere failure of performance by one of the contracting parties does not give rise to a right of restitution against the third person. [66 Am. Jur. 2d, Restitution and Implied Contracts, § 32, p. 628.]
Rather than examining solely whether a defendant was enriched, it is necessary to determine whether that enrichment was unjust or inequitable: "The key to any quantum meruit recovery from a noncontracting party is proof that he or she unjustly received and retained an independent benefit from the plaintiff's contractual services." Id.
As noted previously, neither defendant nor the replacement contractor retained by defendant to finish the project ever paid plaintiffs for the materials and supplies. As the general contractor, defendant *905 was responsible for overseeing all construction and was charged with supervising all subcontractors present on the site, including the replacement contractor retained after Centerline left the project. Moreover, as the general contractor, defendant was surely aware that the materials and supplies used to complete the project had been specially delivered to the site by plaintiffs. Defendant was also likely aware that Centerline, which had gone out of business and had left the project, had not paid for the items. Regardless of whether defendant itself retained and used the materials, or merely acquiesced in the replacement contractor's retention and use of the materials, defendant was necessarily a party to the decision to use and retain the materials without paying plaintiffs.
If defendant's retention of the materials supplied by plaintiffs had been completely innocent and without knowledge, we might be inclined to conclude that defendant's enrichment was not unjust. Id. However, we simply cannot classify defendant's act of retaining and using the materials, without ever ensuring that plaintiffs were compensated for the materials, as innocent, just, or equitable. We conclude that an inequity resulted to plaintiffs from defendant's wrongful retention of the materials. Barber, supra at 375, 509 N.W.2d 791. Defendant's retention of the materials, coupled with defendant's failure to compensate plaintiffs, resulted in the unjust enrichment of defendant at plaintiffs' expense.

C. Satisfaction of Full Contract Price by Defendant
Defendant next argues that it was not unjustly enriched because it paid the full price of the original subcontract with Centerline to the replacement contractor, which was retained after Centerline's departure. Again, we disagree.
Defendant asserts that by the time the construction project was completed, it had paid the replacement contractor not only the full amount that would have been due Centerline under the original subcontract, but also an additional $380,000 for additional costs that were occasioned by Centerline's abandonment of the project. Accordingly, defendant argues that it performed in fullpaying more than the original subcontract priceand was therefore not unjustly enriched by retaining the materials supplied by plaintiffs.
We recognize that defendant may have paid more than the full contract price originally contemplated in the subcontract with Centerline. However, this does not lessen or alleviate defendant's obligation to compensate plaintiffs for the materials that were taken and used in the course of the construction project. The fact that defendant lost money and necessarily paid $380,000 over and above the original subcontract price likely vests defendant with a right of action against Centerline. But the payment of $380,000 above and beyond the originally contemplated subcontract price in no way affects defendant's separate and distinct obligation to plaintiffs. Plaintiffs were not parties to the original subcontract between defendant and Centerline, nor were they parties to the subsequent agreement between defendant and the replacement contractor. Centerline's breach of the initial subcontract had nothing to do with plaintiffs, and the mere fact that Centerline's breach cost defendant more than originally anticipated does not undo the wrongful nature of defendant's retention of plaintiffs' products. We reject the argument that payment in full of the originally anticipated subcontract price somehow negates defendant's obligation to compensate plaintiffs for the inequitably retained materials.


*906 D. Alternative Relief Through Contract Damages
Defendant suggests that plaintiffs' proper remedy was an action for contract damages against Centerline and that the availability of this alternative remedy precluded plaintiffs' claims against defendant for quantum meruit. We disagree.
It is true that, while a claim for contract damages is legal in nature, a claim of quantum meruit is equitable in nature. However, our Supreme Court has long recognized that these two claims may be pleaded in the alternative and that a plaintiff who has performed under a contract may elect between either of these two remedies. See Nyman v. B S Chapin, Inc., 255 Mich. 442, 444-445, 238 N.W. 195 (1931); see also Corman Co. v. L A Young Industries, 231 Mich. 628, 630, 204 N.W. 746 (1925).
"The general rule is well settled that a party to a contract, where labor is to be performed, upon the breach of that contract by the other party, has two remedies open to him. He may sue upon the contract, and recover damages for its breach, or he may ignore the contract, and sue for services and labor and expenses incurred from which he has derived no benefit." [Id., quoting Midland Operating Co. v. Miller, 197 Mich. 567, 570, 164 N.W. 443 (1917).]
Indeed, the general rule in contract disputes is that there is an election of remedies between breach of contract and unjust enrichment, and the choice of remedies is ordinarily with the nonbreaching party. 17B CJS, Contracts, § 602, p. 306.
These rules, allowing simultaneous and alternative claims for breach of contract and unjust enrichment, no longer appear to be good law when both claims are asserted against the same defendant, with whom the plaintiff has an express contractual relationship. As noted above, in such situations the Michigan courts now hold that the existence of the express contract bars the quantum meruit claim. Belle Isle Grill Corp., supra at 478, 666 N.W.2d 271. However, we perceive no reason why a plaintiff should not be allowed to simultaneously and alternatively assert a contract claim against one defendant with whom an express contract exists and a quantum meruit claim against a different defendant with whom no express contract exists.
All three plaintiffs asserted breach of contract claims against Centerline. The three plaintiffs also asserted unjust enrichment claims against defendant. Quite simply, the availability of relief through plaintiffs' breach of contract claims against Centerline in no way barred plaintiffs' unjust enrichment claims against defendant, with which plaintiffs had no express contractual relationship.[6] Plaintiffs were properly allowed to pursue in the alternative their contract claims against Centerline and their quantum meruit claims against defendant.

E. Alternative Relief Through the PWBA
Defendant additionally suggests that plaintiffs' proper remedy was an action on defendant's payment bond and that the availability of this alternative remedy *907 precluded plaintiffs' quantum meruit claims against defendant. We disagree.
Remote material suppliers and sub-subcontractors that furnish materials and supplies to contractors and subcontractors qualify as claimants under the PWBA. MCL 129.203; MCL 129.206; see also W T Andrew Co., Inc. v. Mid-State Surety Corp., 450 Mich. 655, 659, 545 N.W.2d 351 (1996). Thus, plaintiffs would have been entitled to pursue claims against defendant's payment bond in the amounts owed to them by Centerline. MCL 129.203. Had plaintiffs properly pursued claims against the payment bond, they would have been entitled to recovery from the bond in the amounts that they were owed.
Courts in some foreign jurisdictions have determined that recovery under their respective statutory schemes is the exclusive remedy for aggrieved material suppliers and sub-subcontractors that are not paid.[7] However, this is not the law in Michigan. A plaintiff enjoyed the right at common law to recover in quantum meruit from a defendant who had been unjustly enriched at the plaintiff's expense. Indeed, quantum meruit is a common-law remedy. See Mudge v. Macomb Co., 210 Mich.App. 436, 443, 534 N.W.2d 539 (1995), rev'd in part on other grounds, 458 Mich. 87, 580 N.W.2d 845 (1998) (listing "quantum meruit" as a common-law remedy). When a statute provides a remedy for enforcement of a common-law right, the statutory scheme is merely cumulative and not exclusive. Pompey v. Gen. Motors Corp., 385 Mich. 537, 552-553, 189 N.W.2d 243 (1971). Moreover, unlike the texts of certain other statutes, the text of the PWBA does not expressly exclude alternative remedies provided under the common law. See, e.g., Kraft v. Detroit Entertainment, LLC, 261 Mich.App. 534, 546, 683 N.W.2d 200 (2004). Because the remedy provided by the PWBA does not exclude the availability of alternative common-law remedies, plaintiffs' unjust enrichment claims against defendant were not barred by the availability of statutory relief under the PWBA. Notwithstanding the availability of claims against defendant's payment bond under the PWBA, plaintiffs were entitled to seek quantum meruit recovery from defendant.[8]

F. Constructive Trust
Finally, defendant argues that the trial court erred in imposing a constructive trust over certain property or funds in an effort to ensure that defendant would compensate plaintiffs upon a determination of the proper recovery amounts. We disagree.
*908 A court may impose a constructive trust when necessary to do equity or avoid unjust enrichment. Kammer Asphalt, supra at 188, 504 N.W.2d 635. A constructive trust may thus be imposed under any circumstance that renders it unconscionable for the holder of legal title to retain and enjoy the property. Id.
Relying on Kammer Asphalt, defendant asserts that a constructive trust was inappropriate in this case because such a trust may not be imposed against a party that has not contributed to the reasons underlying the imposition of the trust. It is true that a constructive trust "may not be imposed upon parties `who have in no way contributed to the reasons for imposing a constructive trust.'" Id., quoting Ooley v. Collins, 344 Mich. 148, 158, 73 N.W.2d 464 (1955). However, as we determined above, defendant did contribute to the reasons for imposing the constructive trust in this case when it inequitably retained the materials and supplies delivered by plaintiffs without ensuring that plaintiffs were compensated. To the extent that the trial court imposed a constructive trust in this case, we conclude that the trust was appropriate to do equity and prevent unjust enrichment. Kammer Asphalt, supra at 188, 504 N.W.2d 635.

IV. Conclusion
By using the materials and supplies that plaintiffs had delivered to the construction site, without ever ensuring that plaintiffs were properly compensated, defendant inequitably retained the benefit of the materials and supplies at plaintiffs' expense. Reasonable minds could not disagree that defendant was unjustly enriched at the expense of plaintiffs in this case. The trial court correctly ruled that plaintiffs were entitled to judgment as a matter of law. Partial summary disposition with respect to liability on the unjust enrichment claims was properly granted in favor of plaintiffs. In light of our resolution of the issues, we decline to address defendant's remaining argument on appeal.
Affirmed.
DAVID H. SAWYER and RICHARD A. BANDSTRA, JJ., concur.
NOTES
[1]  Plaintiff Robbins & Meyers, Inc., is not a party to this appeal.
[2]  The record indicates that Morris Pumps contracted to provide $66,006 worth of equipment and materials, R. Vander Lind & Son contracted to provide $169,425 worth of equipment and materials, and Chemineer contracted to provide $101,479 worth of equipment and materials.
[3]  At the time Centerline went out of business and abandoned the project, defendant had paid only approximately $1.3 million of the total $3.3 million subcontract to Centerline. It is unclear how much of this $1.3 million, if any, represented the amount owed by defendant to Centerline for the equipment and materials provided by plaintiffs.
[4]  R. Vander Lind & Son and Chemineer also asserted a breach of contract claim against defendant and a claim for declaratory relief.
[5]  Morris Pumps also asserted a claim of account stated against Centerline.
[6]  Only partial summary disposition was granted by the trial court, and we are not aware whether plaintiffs' breach of contract claims against Centerline have been resolved. We express no opinion concerning the likely success of these breach of contract claims, and express no opinion about whether any eventual judgment against Centerline, which has apparently gone out of business, will ever be collectible. However, we note that if the breach of contract claims against Centerline move forward and are successful, plaintiffs will be entitled to only one recovery and will not be permitted to collect full judgments from both Centerline and defendant.
[7]  See, e.g., F. Bender, Inc. v. Jos. L. Muscarelle, Inc., 304 N.J.Super. 282, 284-285, 700 A.2d 374 (1997) (holding that a sub-subcontractor could recover against a general contractor only under the New Jersey mechanic's lien statute and not under a theory of quantum meruit).
[8]  Defendant argues that by allowing material suppliers and sub-subcontractors to maintain unjust enrichment claims against general contractors in addition to the statutory remedy provided by the PWBA, this Court effectively makes all general contractors responsible as guarantors of the debts of their subcontractors. However, this argument must fail. As noted earlier, recovery in quantum meruit is available only when a defendant's enrichment has been unjust or inequitable in nature. 66 Am. Jur. 2d, Restitution and Implied Contracts, § 32, p. 628. Therefore, when a general contractor is merely innocently enriched at the sub-subcontractor's expense, and has not acted unjustly or inequitably in retaining the benefit provided by the sub-subcontractor, an action against the general contractor in quantum meruit will not lie. Only in instances such as the case at bar, in which the general contractor has acted wrongfully or inequitably, will the general contractor be liable to the material supplier or sub-subcontractor in quantum meruit.
