Supreme Court of California

“ When plaintiff used defendant's offer in computing his own bid, he bound himself to perform in reliance on defendant's terms. Though defendant did not bargain for this use of its bid neither did defendant make it idly, indifferent to whether it would be used or not. On the contrary it is reasonable to suppose that defendant submitted its bid to obtain the subcontract. It was bound to realize the substantial possibility that its bid would be the lowest, and that it would be included by plaintiff in his bid. It was to its own interest that the contractor be awarded the general contract ”

“ Whether implied in fact or law, the subsidiary promise serves to preclude the injustice that would result if the offer could be revoked after the offeree had acted in detrimental reliance thereon. Reasonable reliance resulting in a foreseeable prejudicial change in position affords a compelling basis also for implying a subsidiary promise not to revoke an offer for a bilateral contract.
[4] The absence of consideration is not fatal to the enforcement of such a promise. ”

“ There is no merit in defendant's contention that plaintiff failed to state a cause of action, on the ground that the complaint failed to allege that plaintiff attempted to mitigate the damages or that they could not have been mitigated. Plaintiff alleged that after defendant's default, "plaintiff had to procure the services of the L & H Co. to perform said asphaltic paving for the sum of $10,948.60." Plaintiff's uncontradicted evidence showed that he spent several months trying to get bids from other subcontractors and that he took the lowest bid. ”