Arcor, Inc. (Arcor), is engaged in the business of metal perforation. In May of 1986, Arcor bought from Bridgeport Machines, Inc. (Bridgeport), then a subsidiary of Textron, Inc. (Textron), a Japax Model SDX10NC small-hole-drilling electrical discharge machine (Japax machine). Two years and approximately 30 service calls later, Arcor sued Bridgeport and Textron for breach of warranty, alleging that the machine did not work properly and failed to meet certain contract specifications as set out in ■ Arcor’s purchase order. The case was tried before a jury, which returned a verdict for Arcor in the amount of $200,-000. The district court entered judgment on the verdict and denied defendants’ motion for a judgment notwithstanding the verdict or a new trial.
On appeal, defendants advance four errors that they claim warrant a reversal of the jury verdict: (1) the jury’s verdict was the product of prejudicially improper evidence and argument concerning damages; (2) Arcor failed to prove that the machine’s failure to perform as specified in the contract was due to a defect in the machine, rather than to Arcor’s misuse; (3) Arcor’s claims that the machine failed to conform *712 to the contract’s requirements as to hole-diameter accuracy were barred as a matter of law by Arcor’s failure to give timely notice of breach under section 2-607(3) of the Illinois Uniform Commercial Code, Ill. Rev.Stat. ch. 26; and (4) the court improperly invaded the province of the jury by preventing the jury from deciding what terms were included in the contract between Arcor and Bridgeport.
I. DAMAGES
Approximately two and one-half years after purchasing the Japax machine, Arcor replaced it with a larger and significantly more expensive Elox brand electrical discharge machine (Elox machine). Early in the trial the district court ruled that Arcor was not entitled to recover the cost of the Elox machine as “cover” under section 2-712(1) of the Illinois Uniform Commercial Code, because Arcor had never revoked its acceptance of the Japax machine. 1 In a later, written opinion the court also held that the cost of the Elox machine was “not available” as a measure of the difference in value between the Japax machine “as delivered” and the Japax machine “as promised,” the standard measure of damages for breach of warranty. 2
Nevertheless, during closing argument Arcor’s counsel twice asked for damages of “over $490,000,” an amount that included the cost of the Elox machine. Counsel also placed before the jury a chart that included the cost of the Elox machine as an element of damages. The defendants objected to the use of the chart, and Arcor’s counsel agreed to take it down. The defendants then requested that the court instruct the jury that the Elox figure “was not material to the damage calculations.” Tr. at 1439. The judge did not respond directly to the defendants’ request, but instead overruled the defendants’ objection.
During the court’s instructions to the jury defendants renewed their request that the jury be instructed “not to consider the price of the Elox matching [sic] in their deliberations.” Tr. at 1498. The court acknowledged that defense counsel had a “good point,” but concluded that a curative instruction was not necessary “because there was no evidence for the jury to consider. You have just the reference to which you objected at the time.” Id. Defendants argue that the court committed reversible error by refusing to give a curative instruction regarding the price of the Elox machine in response to Arcor’s improper argument.
“It is within the trial court’s discretion to determine whether counsel’s remarks require admonition to the jury, and that discretion will only be upset for clear abuse.”
Canada Dry Cory. v. Nehi Beverage Co.,
Moreover, the improper arguments of Arcor’s counsel do not rise to the level of reversible error. Improper statements during closing arguments warrant reversal only if they “influenced the jury in such a way that substantial prejudice resulted to” the opposing party.
Fenolio v. Smith,
“Because a damage award is an exercise in fact-finding, only those awards that are ‘monstrously excessive,’ born of passion and prejudice, or not rationally connected to the evidence may be altered.”
Pincus v. Pabst Brewing Co.,
The jury was also entitled, contrary to defendants’ argument, to consider the cost of the Japax machine in its damages calculation. Arcor offered evidence that the “current” value of the machine was between $5,000 and $10,000. The jury could reasonably have concluded that the cost of the Japax represented its value as warranted, and its current value represented its value as delivered to Arcor.
See Gray v. Davis,
*714
The damages items discussed thus far total $231,896.49. Even after subtracting from this amount the profits Arcor earned from jobs run on the Japax machine ($17,912.31), the evidence as to these claims is sufficient to support the jury’s award. In addition, the jury could reasonably have awarded Arcor $100,479.00 for profits lost on jobs not obtained. The defendants argue that these damages were improperly submitted to the jury because the evidence presented in support of those claims was “too speculative.” Br. at 34. Arcor’s president, Gil Johnson, testified at trial about a number of jobs that Arcor would have received from its pre-existing customers if the Japax machine could have performed as promised. Johnson testified that his knowledge about these jobs was based on information provided by the customers themselves. The defendants argue that such hearsay testimony cannot be an adequate basis for an award of damages. In support of this proposition the defendants cite
Alguire v. Walker,
II. CAUSATION
The defendants argue that they were entitled to judgment notwithstanding the verdict because Arcor did not prove that the Japax machine’s failure to perform according to the contract specifications was caused by a defect in the machine rather than by Arcor’s misuse. In a diversity case, state law provides the standard of review for denial of a motion for JNOY.
Ft. Howard Paper Co. v. Standard Havens, Inc.,
III. NOTICE OF BREACH
Section 2-607(3)(a) of the Illinois Uniform Commercial Code requires the buyer of goods to give the seller notice of a breach of implied warranty “within a reasonable time after he discovers or should have discovered the breach.” Ill.Rev.Stat. ch. 26, § 2-607(3)(a) (1989). The defendants argue that Arcor failed to fulfill this requirement as to the machine’s inability to meet the contract specifications for hole-diameter accuracy. The defendants informed Arcor that the machine would not be able to meet Arcor’s hole-diameter specification approximately two months after the machine was installed, but Arcor never notified the defendants that it considered this problem to constitute a breach of the implied warranty. The defendants argue that they were therefore entitled to a directed verdict as to Arcor’s hole-diameter claims.
Under Illinois law, the buyer is not required to notify the seller that the buyer considers the deficiencies of a product to constitute a “breach” in order to fulfill its obligation under section 2-607(3)(a). “[Notification need merely be sufficient to let the seller know that the transaction is still troublesome. There is no need to state all objections the buyer has or for the buyer to say he is holding the seller liable and threaten litigation.”
Crest Container Corp. v. R.H. Bishop Co.,
Further, the defendants’ argument would not justify reversing the jury’s verdict even if we were to accept it, because the defendants have not shown which, if any, of Arcor’s claims were based on the Japax machine’s failure to conform to the hole-diameter requirements of the contract. Indeed, the defendants argued in their motion for JNOV that Arcor’s “actual evidence related to problems with positioning,” not hole diameter. Therefore, even if the defendants were correct that any claim based on hole-diameter problems is barred, the defendants have not shown that there is any such claim.
IV. DETERMINATION OF CONTRACT TERMS
The district court found that the contract between Arcor and Bridgeport for the sale of the Japax machine was formed by Arcor’s purchase order (the offer) and a March 3, 1986 letter from the McWilliams division of Bridgeport to Arcor (the acceptance). The court also found that these written documents were intended by the parties to be the final, but not exclusive, expression of their agreement. Therefore, the court concluded that evidence of consistent additional terms was proper. Accordingly, the court instructed the jury that the terms of a March 6, 1986 letter from McWilliams to Arcor could “be considered as evidence of additional terms of the contract,” but “only if you conclude that it is evidence of consistent additional terms the parties agreed upon when they formed their March 3, 1986 contract.” Tr. at 1501. The defendants argue that the district court thus usurped the jury’s role of deciding what terms comprised the contract. We find this argument to be without merit.
The defendants note that “[wjith respect to the question of what terms may or may not be part of the contract, the U.C.C. limits the trial court’s role to determining *716 whether the writing(s) at issue were intended by the parties to be ‘a complete and exclusive statement of the terms of the agreement.’ ” Br. at 47, quoting Ill.Rev. Stat. ch. 26, § 2-202(b) (1989). The defendants argue that the district court exceeded this role by unduly limiting the circumstances under which the terms of the March 6 letter could be considered part of the contract. The defendants claim that, under the Illinois Uniform Commercial Code, “[a] contract may, in most circumstances ‘be explained or supplemented ... (b) by evidence of consistent additional terms.’ ” Br. at 48, citing Ill.Rev.Stat. ch. 26, § 2-202(b) (1989). Thus, because the terms of the March 6 letter are neither inconsistent with nor contradictory to the written documents, the jury should have been permitted to find that those terms “supplemented] any prior agreement” even if they had not been agreed to by March 3.
The defendants seriously misstate the law. The Illinois Uniform Commercial Code does not provide that a contract may be explained or supplemented by evidence of additional terms. Rather, section 2-202 reads, in pertinent part:
Terms with respect to which the confirmatory memoranda of the parties agree or which are otherwise set forth in a writing intended by the parties as a final expression of their agreement with respect to such terms as are included therein ... may be explained or supplemented ... (b) by evidence of consistent additional terms unless the court finds the writing to have been intended also as a complete and exclusive statement of the terms of the agreement.
Ill.Rev.Stat. ch. 26, § 2-202 (1989) (emphasis added). In other words, it is the writing, not the agreement itself, that may be supplemented by evidence of consistent additional terms. This distinction is crucial. If one accepts the court’s conclusion that a contract between the parties was indeed formed on March 3 (and the defendants do not really dispute it), then under section 2-202 the March 6 letter can only be either evidence of terms to which the parties had already agreed but which were not included m the written documents that formed the contract, or an attempt to modify that agreement. The district court’s determination that the contract was formed on March 3 explicitly left it open to the jury to decide which characterization was correct.
V. CONCLUSION
For the foregoing reasons, the judgment of the district court is Affirmed.
Notes
. Section 2-711 provides:
Where the seller fails to make delivery or repudiates or the buyer rightfully rejects or justifiably revokes acceptance then with respect to any goods involved, ... the buyer may cancel and ... may in addition to recovering so much of the price as has been paid
(1) “cover” and have damages under the next section as to all the goods affected....
IIl.Rev.Stat. ch. 26, § 2-711 (1989).
. Ill.Rev.Stat. ch. 26, § 2-714(2) (1989).
. This total includes the following items:
Excess manufacturing/press
hours (Pl.Ex. 32).$27,130.00
Other expenses (Pl.Ex. 33). 2,522.44
Wages paid to Japax operators (Pl.Ex. 35). 54,570.97
Subcontracted die work (Pl.Ex. 36) . 20,584.00
Defendants assert in their reply brief that they do not concede the legal sufficiency of two of these claims&emdash;the excess manufacturing/press hours and the subcontracted die work. Reply Br. at 11. However, we need not consider arguments not raised in the main brief. “An appellant's argument is to be made in its
opening,
not its reply, brief.”
Real Estate Data, Inc. v. Sidwell Co.,
. Section 2-715 provides:
(2) Consequential damages resulting from the seller’s breach include:
(a) any loss resulting from general or particular requirements and needs of which the seller at the time of contracting had reason to know and which could not reasonably be prevented by cover or otherwise;....
Ill.Rev.Stat. ch. 26, § 2-715 (1989).
