The plaintiff, a contractor, was preparing its bid for construction at the Cape Cod Community College. It received an "estimate” of $15,900 for movable steel partitions from the defendant, and used the estimate in preparing the bid it submitted. The construction contract was awarded to the plaintiff, the defendant refused to perform in accordance with its estimate, and the plaintiff engaged another company to supply and install the partitions for $23,000. The Appeals Court upheld an award of damages to the plaintiff, we allowed the defendant’s petition for further appellate review, and we affirm the judgment for the plaintiff.
The action was filed in 1970. Demurrers to the declaration and to an amended declaration were sustained, and leave to file a second amended declaration was then denied, the judge "being of opinion there is no cause of action.” The Appeals Court held that count 1 of the amended declaration did set out a cause of action, and reversed the order denying leave to amend.
*759 We summarize the evidence most favorable to the plaintiff. On May 20,1968, the plaintiff was preparing its bid to become general contractor on the construction project. The specifications called for movable metal partitions from the defendant or one of two other suppliers, "or equal.” About fifteen days earlier, a sales engineer employed by the defendant had prepared a "quotation” or "estimate” of $15,900 for supplying and installing the partitions. The figure was based on information received from the architect’s office, and the engineer knew that the general contractor would submit a bid based on such estimates from subcontractors. The estimate was given to the plaintiff by telephone on May 20, 1968; it was also given to other general contractors. The engineer waited until shortly before bids were due on the general contract to prevent the general contractor from shopping for a lower price from other subcontactors. The plaintiff received no other quotations on the partitions, and used the defendant’s quotation in preparing the bid on the general contract, submitted the same day.
The general contract was awarded to the plaintiff on June 21 or 26, 1968. Some time in August or September, the plaintiff informed the defendant that it was getting ready to award the partition contract and asked whether it had the defendant’s lowest price. Thereafter, on September 12, 1968, the plaintiff sent the defendant an unsigned subcontract form based on the $15,900 figure. The defendant rejected the subcontract, and the plaintiff engaged another company to supply and install the partitions for $23,000. The partition work was not scheduled to begin until the summer of 1969; in fact, work began in the summer of1970, and the last payment for it was made in 1972.
At the close of the plaintiff’s evidence, it waived counts 2, 3 and 4 of the declaration. The defendant rested and moved for a directed verdict. The motion was denied. After verdict, the defendant moved for judgment notwithstanding the verdict, and that motion was denied. The *760 questions argued to us relate to the question whether the evidence made a case for the jury.
1.
The offer or promise.
The defendant argues that the "quotation” or "estimate” made by its sales engineer was not an offer or promise, but merely an invitation to further negotiations, citing
Cannavino & Shea, Inc.
v.
Water Works Supply Corp.,
2.
Reliance on the promise.
It seems clear enough, as the Appeals Court held, that the evidence made a case for the jury on the basis of the plaintiffs reliance on the defendant’s promise. "An offer which the offeror should reasonably expect to induce action or forbearance of a substantial character on the part of the offeree before acceptance and which does induce such action or forbearance is binding as an option contract to the extent necessary to avoid injustice.” Restatement (Second) of Contracts § 89B(2) and Illustration 6 (Tent. Drafts Nos. 1-7, 1973). This doctrine is not so novel as the defendant contends. In addition to the authorities cited by the Appeals Court, see
Cannavino & Shea, Inc.
v.
Water Works Supply Corp.,
3.
Procedural unfairness.
The defendant contends that the decision of the Appeals Court, resting on "the new theory of promissory estoppel,” departed from the pleadings and from the theory on which the case was tried. So far as the pleadings are concerned, count 1 of the declaration alleged an exchange of promise for promise and also the submission of a bid by the plaintiff in reliance on the agreement between the parties. If either allegation was sustained by proof, the other could be treated as surplus-age. The pleadings could have been amended to conform to the evidence, even after judgment; failure so to amend does not affect the result of the trial. Mass. R. Civ. P. 15(b),
In view of the defendant’s claim of procedural unfairness, we requested and received a transcript of the judge’s charge to the jury. The defendant does not assert any error with respect to the charge, and did not include the charge in its record appendix. We do not treat the charge as the "law of the case.” See
Commonwealth
v.
Krasner,
Pursuant to the charge and on the evidence before them, the jury might have found that the defendant’s offer was accepted in any one of three ways. First, there might have been an exchange of promises in the plaintiffs telephone conversation with the defendant’s engineer, before the plaintiffs bid was submitted. Second, the offer might have been accepted by the doing of an act, using the defendant’s estimate in submitting the plaintiff’s bid. Acceptance in this way might be complete without notification to the offeror.
Bishop
v.
Eaton,
"In the typical bargain, the consideration and the promise bear a reciprocal relation of motive or inducement: the consideration induces the making of the promise and the promise induces the furnishing of the consideration.” Restatement (Second) of Contracts § 75, Comment b (Tent. Drafts Nos. 1-7, 1973). In the present case, the jury could infer that the defendant’s engineer intended to induce the plaintiffs promise or action in the hope that the defendant would benefit, and thus that his offer or promise was induced by the hoped-for acceptance. Even more clearly, the jury could find that the plaintiffs promise or action was induced by the defendant’s offer or promise. Such findings would warrant the conclusion that there was a "typical bargain,” supported by consideration. See
Air Conditioning Co. of Hawaii
v.
Richards Constr. Co.,
4. Statutory policy. The defendant did not argue any question of statutory policy to the Appeals Court. It argues to us that the decision of the Appeals Court is contrary to the policy of G. L. c. 149, §§ 44A-44L, regulating bidding on contracts for the construction of public works. The argument seems to relate primarily to subcontract bids described in § 44C. Such bids must be listed in the general contractor’s bid under § 44F, and must be filed with the awarding authority under § 44H. The de *764 fendant was not in any of the trades to which those provisions apply. In any event, the argument relates only to the reliance doctrine on which the Appeals Court based its decision. We decide on a different basis.
5. Other issues. Several other matters argued by the defendant to the Appeals Court are discussed in the opinion of that court: unreasonable delay by the plaintiff in notifying the defendant that it was to be the subcontractor, "bid shopping” by the plaintiff, and application of the Statute of Frauds, G. L. c. 106, § 2-201, and c. 259, § 1, Fifth. The defendant has not emphasized these matters in its argument to us. The Appeals Court held that they did not bar recovery based on reliance, and they have no more force to bar recovery based on bargain plus reliance. We therefore do not consider them.
Judgment of the Superior Court Department affirmed.
Notes
Cases holding that a subcontractor may be bound on the basis of reliance by the general contractor include
Janke Constr. Co.
v.
Vulcan Materials Co.,
