[¶ 1] Jeffrey Stenzel and Robert Gerber appeal from a judgment of the Superior Court (Cumberland County, Crowley, J.) dismissing their class action complaint in favor of enforcing an arbitration clause in the standard form agreement between them and Dell. 1 Stenzel and Gerber’s first amended complaint alleged that Dell had unlawfully collected sales taxes from them on service contracts and shipping charges. On appeal, they argue that the court erred in dismissing the action because (1) they never manifested an intent to be bound by the arbitration clause; (2) the contract as a whole, and the arbitration clause in particular, are illusory; and (3) the arbitration clause is unconscionable. We disagree and affirm the judgment. We also affirm the judgment as it applies to QualXServ, LLC, and BancTec, Inc., the third-party service providers, because, as Dell’s assigns, they are expressly entitled to enforce the arbitration provision.
I. CASE HISTORY
[¶ 2] Dell is a Texas-based computer company that ships the computers it sells from Texas and Tennessee. In addition to selling computers, Dell sells service contracts on its own behalf and as an agent for service providers such as BancTec, Inc. and QualXServ, LLC. In October 2002, Stenzel purchased a Dell computer and an optional service contract through Dell’s telephone sales process. He paid $2670.15, $127.15 of which was sales tax on a “taxable” amount that included the service contract and a charge for shipping the computer to Stenzel’s business in Brunswick. Gerber likewise purchased a Dell computer and optional service contract, *138 but did so through Dell’s Internet website. He paid $2514.65, $10.65 of which was sales tax on a “taxable” amount that included the service contract and a charge for shipping the computer to his home in Freeport. After collecting sales tax, Dell either turns it over to the service providers for remission to the State of Maine or remits the amounts directly to the State on behalf of the providers.
[¶ 3] After receiving computer orders, Dell sends customers an order acknowledgment form, the back of which contains Dell’s “Terms and Conditions Agreement.” A copy of the agreement is also included in the box in which the computer is shipped, and the agreement is available for customers to view on Dell’s website before placing orders. The agreement begins with the following notice:
PLEASE READ THIS DOCUMENT CAREFULLY!
IT CONTAINS VERY IMPORTANT INFORMATION ABOUT YOUR RIGHTS AND OBLIGATIONS, AS WELL AS LIMITATIONS AND EXCLUSIONS THAT MAY APPLY TO YOU. THIS DOCUMENT CONTAINS A DISPUTE RESOLUTION CLAUSE
[¶ 4] The two provisions most central to this dispute are the reservation clause in the preamble to the agreement, which reserves to Dell the unilateral right to change the agreement, and an arbitration clause requiring any claim against Dell to be submitted to binding arbitration. The reservation clause states: “These terms and conditions are subject to change without prior written notice at any time, in Dell’s sole discretion.” The arbitration clause provides:
13. Binding Arbitration. ANY CLAIM ... AGAINST DELL, its agents, employees, successors, assigns or affiliates (collectively for purposes of this paragraph, “Dell”) arising from or relating to this Agreement, its interpretation, or the breach, termination or validity thereof, the relationships which result from this Agreement (including, to the full extent permitted by applicable law, relationships with third parties who are not signatories to this Agreement), Dell’s advertising, or any related purchase SHALL BE RESOLVED EXCLUSIVELY AND FINALLY BY BINDING ARBITRATION ADMINISTERED BY THE NATIONAL ARBITRATION FORUM (NAF) .... The arbitration will be limited solely to the dispute or controversy between Customer and Dell.
The agreement also contains a choice of law provision that establishes that sales subject to the agreement are governed by the laws of Texas.
[¶ 5] In June 2003, Stenzel and Gerber filed a class action complaint in the Superi- or Court that challenged Dell’s collection of sales tax on service contracts and shipping charges because Maine does not impose a sales tax on those costs. 36 M.R.S.A. §§ 1752(14)(B)(4), (14)(B)(7), 1811 (Supp.2004). Dell moved to dismiss the complaint in favor of arbitration pursuant to the Federal Arbitration Act (FAA), 9 U.S.C.A. §§ 1-307 (1999 & Supp.2004), or, in the alternative, the Maine Uniform Arbitration Act, 14 M.R.S.A. §§ 5927-5949 (2003). Having found the arbitration clause to be neither procedurally nor substantively unconscionable, the trial court dismissed the complaint in favor of arbitration. This appeal followed.
II. DISCUSSION
[¶ 6] We review a trial court’s decision on a “motion to compel arbitration for errors of law and for facts not sup
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ported by substantial evidence in the record.”
Saga Communications of New England, Inc. v. Voornas,
A. Choice of Law for Determination of Contract Formation
[¶ 7] The agreement provides: “THIS AGREEMENT AND ANY SALES THEREUNDER SHALL BE GOVERNED BY THE LAWS OF THE STATE OF TEXAS, WITHOUT REGARD TO CONFLICTS OF LAWS RULES.” When a contract contains a choice of law provision, we generally will interpret the contract under the chosen state’s laws.
Schroeder v. Rynel, Ltd.,
[¶ 8] Stenzel and Gerber assert that we should not apply the Texas choice of law provision in deciding whether an arbitration agreement exists because that presupposes the existence of a valid contract. They also observe, however, that “there do not appear to be any significant differences between the laws of Texas and Maine on this score.” Stenzel and Gerber do not contend that the Superior Court erred by adhering to the agreement’s choice of law provision or that they were harmed as a result. Accordingly, we assume, without deciding, that the agreement’s choice of law provision controls and that Texas law governs the determination of all of the issues presented by this appeal.
B. Plaintiffs’ Acceptance of the Arbitration Agreement
[¶ 9] Stenzel and Gerber argue that the trial court erred in dismissing the case in favor of arbitration because Dell failed to prove that they accepted the arbitration *140 agreement. Specifically, they reason that because Dell did not advise them of the right to reject the terms of the agreement — including the arbitration clause — or of the method by which to communicate their rejection, their acceptance of the agreement cannot be inferred from their failure to do so.
[¶ 10] “[I]n order to be legally binding, a contract must be sufficiently definite in its terms so that a court can understand what the promisor undertook [and its] material terms ... must be agreed upon before a court can enforce [it].”
Lynx Exploration & Prod. Co. v. 4-Sight Operating Co.,
[¶ 11] The agreement contains the following provision regarding the means by which a purchaser accepts its terms and conditions:
By accepting delivery of the computer systems, related products, and/or services and support, and/or other products described on that invoice[, the customer] agrees to be bound by and accepts these terms and conditions. If for any reason Customer is not satisfied with a Dell-branded hardware system, Customer may return the system under the terms and conditions of Dell’s Total Satisfaction Return Policy ....
Stenzel and Gerber contend that the agreement, including its arbitration clause, is unenforceable because, although the agreement provides expressly the method to reject a hardware system, it fails to provide expressly the method to reject the terms of the agreement.
[¶ 12] The trial court found that Stenzel and Gerber “had at least three opportunities to review the terms of the agreement, including the arbitration clause, before deciding to accept or reject it.” Their failure to refuse delivery of the computers or to exercise their right to return the computers once they were delivered was conduct by which both parties recognized the existence of a contract.
See
TEX. BUS. & COM. CODE ANN. § 2.204(a). By accepting delivery of the computers, and then failing to exercise their right to return the computers as provided by the agreement, Stenzel and Gerber expressly manifested their assent to be bound by the agreement, including its arbitration clause.
See Carnival Cruise Lines, Inc. v. Shute,
[¶ 13] Stenzel and Gerber also assert that the trial court failed to expressly find that they accepted the arbitration clause. Although the court did not make a specific finding, it is apparent from the court’s detailed and thoughtful analysis of the un-conscionability claim, that it viewed Sten-zel and Gerber as having manifested their assent to the arbitration provision. The record supports such a conclusion.
[¶ 14] Accordingly, the court did not err in concluding that Stenzel and Gerber manifested their acceptance of the arbitration clause in the agreement.
C. Whether the Agreement to Arbitrate is Illusory
[¶ 15] As a preliminary matter, Dell, citing
Prima Paint Corp. v. Flood &
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Conklin Manufacturing Co.,
[¶ 16] Stenzel and Gerber’s assertion that the arbitration clause is illusory is based on the reservation clause in the preamble: “These terms and conditions are subject to change without prior written notice at any time, in Dell’s sole discretion.” Stenzel and Gerber assert that Dell’s unfettered right to alter the agreement, including the arbitration clause, renders the agreement to arbitrate illusory. Dell counters, and the trial court concluded, that the reservation clause merely serves to provide notice to Dell’s on-line customers that future sales may be covered by different terms and conditions. In support of this construction, the court noted that other provisions in the agreement, most notably its integration clause, establish Dell’s intention to be bound by the agreement’s terms once a purchaser has accepted delivery of a Dell computer. The agreement’s integration clause states that absent a separate written agreement, any attempt to alter the terms of the agreement is prohibited. 2
[¶ 17] A separate provision of the agreement cited by the court in support of its construction provides:
THESE TERMS AND CONDITIONS APPLY (i) UNLESS THE CUSTOMER HAS SIGNED A SEPARATE PURCHASE AGREEMENT WITH DELL, IN WHICH CASE THE SEPARATE AGREEMENT SHALL GOVERN; OR (ii) UNLESS OTHER DELL STANDARD TERMS APPLY TO THE TRANSACTION.
[¶ 18] Stenzel and Gerber contend that this provision does not lend additional sup
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port to the court’s construction because the use of the present perfect verb tense (“has signed”) in the first clause refers to an agreement that has already been completed and does not anticipate future agreements.
See Barrett v. United States,
[¶ 19] Contrary to Stenzel and Gerber’s contentions, both clauses support the court’s construction of the agreement and neither renders the agreement illusory. The first clause is consistent with the court’s construction because it simply provides that absent a separate, signed purchase agreement, the purchase is governed by the terms and conditions of the agreement. The second clause also supports the court’s construction because it has the effect of rendering the agreement the exclusive source for the transaction’s terms and conditions in the absence of other applicable Dell standard terms. Neither party asserts that there are other Dell standard terms that apply to Stenzel and Gerber’s purchases.
[¶20] Under Texas law, contracts must be construed “as a whole in an effort to harmonize and give effect to all the provisions of the contract so that none will be rendered meaningless. No single provision taken alone will be given controlling effect; rather, all the provisions must be considered with reference to the whole instrument.”
Shell Oil Co. v. Khan,
[¶ 21] Stenzel and Gerber also assert, however, that the apparent conflict between the reservation and integration clauses results in an ambiguity that must be construed in their favor because the agreement is an adhesion contract prepared by Dell.
See Liszt v. Karen Kane, Inc.,
No. 3:97-CV-3200-L,
[¶ 22] We need not determine whether the two provisions result in an ambiguity, because even if they do, it would not justify the invalidation of the agreement as suggested by Stenzel and Gerber. If the agreement is ambiguous, the reservation clause must be construed against Dell and in favor of its customers by restricting Dell’s right to modify the terms of the agreement as to future purchases only. The opposite result — invalidating the entire agreement, including the arbitration provision — would be contrary to the reasonable expectations of the mem *143 bers of the public who purchase computers from Dell.
[¶ 23] Neither the agreement as a whole nor its requirement of arbitration is illusory.
D. Unconscionability
[¶ 24] Stenzel and Gerber contend that the circumstances surrounding the creation of the arbitration clause render the agreement to arbitrate procedurally and substantively unconscionable.
[¶ 25] The Texas Supreme Court has held that a court “may consider both procedural and substantive unconscionability of an arbitration clause in evaluating the validity of an arbitration provision.”
In re Halliburton Co. & Brown & Root Energy Servs.,
[¶ 26] Stenzel and Gerber contend that as a contract of adhesion, the agreement was procedurally unconscionable because they had no meaningful opportunity to negotiate its terms. The trial court correctly found that the agreement is a contract of adhesion, which is a “standardized contract [form] offered to consumers of goods and services on an essentially ‘take it or leave it’ basis which limit[s] the duties and liabilities of the stronger party.”
Melody Home Mfg. Co. v. Barnes,
[¶ 27] When substantive unconscionability is at issue, the inquiry focuses on the fairness of the agreement.
See H.E. Butt,
[¶ 28] Stenzel and Gerber also contend that the arbitration provision is substantively unconscionable because it expressly precludes them from bringing class action lawsuits. The Texas Supreme Court has held, however, that “[procedural devices” such as class actions “may ‘not be construed to enlarge or diminish any substantive rights or obligations of any parties to any civil action.’ ”
Southwestern Ref. Co. v. Bernal,
[¶ 29] Finally, Stenzel and Gerber assert that the costs associated with arbitrating individual claims effectively preclude them from obtaining relief. The United States Supreme Court has ruled that where “a party seeks to invalidate an arbitration agreement on the ground that arbitration would be prohibitively expensive, that party bears the burden of showing the likelihood of incurring such costs.”
Green Tree Fin. Corp.-Ala. v. Randolph,
[¶ 30] The agreement expressly requires Stenzel and Gerber to submit claims to the National Arbitration Forum (NAF). Pursuant to NAF rules, purchasers incur a $25 filing fee to initiate arbitration, which can be completed without a hearing through written submissions, and an additional $75 fee if a participatory hearing is scheduled. Purchasers will also incur an additional $100 fee if they request written findings from the arbitrator.
[¶ 31] The mandatory fees associated with the arbitration might lead us to conclude that the arbitration clause is unconscionable if the fees required by the agreement were an insurmountable barrier to a complete recovery by a claimant. Rule 37(c) of the NAF Code of Procedure provides, however, that an arbitration “[a]ward may include fees and costs awarded by an Arbitrator in favor of any Party.” NATIONAL ARBITRATION FORUM, CODE OF PROCEDURE 27 (July 1, 2003). Because an NAF arbitrator can award a successful Dell customer the fees and costs of arbitration, Stenzel and Gerber have not established the likelihood of incurring prohibitively expensive costs by proceeding through the NAF’s procedures.
[¶ 32] Assessing the totality of the circumstances at the time the parties entered into the agreement, we cannot conclude that the one-sided aspects of the arbitra
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tion provision render it unconscionable.
See El Paso Natural Gas Co. v. Minco Oil
&
Gas Co.,
E. Enforcement of the Arbitration Provision by the Service Providers
[¶ 33] Stenzel and Gerber contend that even if the arbitration clause is enforceable between them and Dell, it is not enforceable as between them and the third-party service providers, BancTec and QualXServ. They assert that the service providers are not the “agents, employees, successors, assigns or affiliates” of any Dell entity, and they add that the separate service agreements they received directly from the service providers following their purchases do not address arbitration. Consequently, they assert the court should not have dismissed their claims against the service providers in favor of arbitration.
[¶ 34] The trial court’s decision granting Dell’s motion to dismiss and to compel arbitration did not expressly address whether the service providers could enforce the arbitration provision; nor did Stenzel and Gerber request additional findings concerning enforcement by the service providers.
[¶ 35] Before us, the parties have focused primarily on whether BancTec and QualXServ qualify as Dell’s “agents” and, as such, can enforce the arbitration clause. We agree with Stenzel and Gerber that Dell acted as the agent of BancTec and QualXServ, and not vice versa, by contracting to provide Stenzel and Gerber extended service on them new computers. Nonetheless, we conclude that BancTec and QualXServ can enforce the arbitration provision because they are also the assigns of Dell.
[¶ 36] Dell receives a single payment for both the computer and any extended service purchased by a customer and, in some instances, the obligation to provide the extended service is assumed by a service provider other than Dell. Both Stenzel and Gerber’s acknowledgment forms refer to the purchase of a service contract, but neither identify the third-party service provider slated to provide the extended service. 4
[¶ 37] Because Dell’s acknowledgment forms include the charges for the service contracts, and customers’ payments are made directly to Dell, it can fairly be inferred that Dell remits all or a portion of the payment for the service contracts to the third-party sendee providers. Consequently, the service providers become Dell’s assigns and, as such, are delegated Dell’s duty of performance. See RESTATEMENT (SECOND) OF CONTRACTS § 317(1) (1981) (“An assignment of a right is a manifestation of the assign- or’s intention to transfer it by virtue of which the assignor’s right to performance by the obligor is extinguished in whole or in part and the assignee acquires a right to such performance.”); id. § 318(1) (“An obligor can properly delegate the performance of his duty to another unless the delegation is contrary to public policy or the terms of his promise.”); see also TEX. BUS & COM. CODE ANN. § 2.210(b) (Vernon Supp.2004) (“Unless otherwise agreed all rights of either seller or buyer can be assigned except where the assignment would materially change the duty of *146 the other party, or increase materially the burden or risk imposed on him by his contract, or impair materially his chance of obtaining return performance.”). Pursuant to the agreement’s arbitration clause, any claim against Dell’s assigns shall be resolved exclusively by arbitration. Accordingly, the trial court did not err in dismissing Stenzel and Gerber’s claims against all of the defendants, including BancTec and QualXServ, and in granting Dell’s motion to compel arbitration.
The entry is:
Judgment affirmed.
Notes
. The defendants named in this action are Dell, Inc., Dell Catalog Sales Limited Partnership, Dell Marketing Limited Partnership, and service providers QualXServ, LLC, and Banc-Tec, Inc. Throughout this opinion, we refer to the defendants generally as Dell. We refer to QualXServ, LLC, and BancTec, Inc., specifically, as the service providers.
. The agreement’s integration clause states:
Other than as specifically provided in any separate formal purchase agreement between Customer and Dell, these terms and conditions may NOT be altered, supplemented, or amended by the use of any other document(s). Any attempt to alter, supplement or amend this document or to enter an order for product(s) which is subject to additional or altered terms and conditions will be null and void, unless otherwise agreed to in a written agreement signed by both Customer and Dell.
. Stenzel and Gerber also contend that Dell’s use of the Better Business Bureau’s OnLine Reliability Seal renders the agreement procedurally unconscionable because of Dell's failure to comply with some of the terms of the BBB OnLine program. They point out, for example, that Dell did not comply with the program’s requirement of a separate signature line where a consumer can acknowledge acceptance of an agreement to arbitrate. As the trial court pointed out, however, the BBB standards are "guidelines for on-line businesses to aspire to and are not legally binding.” Furthermore, participation in the BBB OnLine program requires only that businesses substantially comply with BBB criteria. Accordingly, Dell's failure to comply with some of the terms of the BBB OnLine program does not render the agreement procedurally unconscionable.
. Stenzel's acknowledgment does not specify whether the service was to be provided directly by Dell or by one of the service providers, and Gerber's expressly states that his service would be provided by a third party. On Gerber’s acknowledgment there is an item described as a "Type 3-Third Party At Home Service, 24x7 Technical Support.”
