I switch (modified to include a peripheral gasket) rather than the price of the original, gasket-less switch set forth in the price quotation. In doing so, McGill rejected the express condition Frigidaire placed on acceptance: assent to each and every term in the purchase order. If an acceptance is conditioned on assent to new terms, and assent is not forthcoming, the transaction aborts. See Dorton v. Collins & Aikman Corp., 453 F.2d 1161, 1166 (6th Cir.1972) (Dorton); Uniroyal, Inc. v. Chambers Gasket & Manufacturing Co., 177 Ind.App. 508, 380 N.E.2d 571, 575 (Ind.Ct.App.1978) (Uniroyal). Frigidaire argues that the signature of McGill’s sales representative acted as a complete assent to the terms proposed in the purchase order. For support, Frigidaire relies on Falcon, 355 A.2d at 906 (<HOLDING>). Frigidaire’s argument, however, ignores a
recognizing that generally    with supposed unilateral contracts  if the offeror expressly reserves the power to revoke the offer until the offerees performance is complete then the offer is illusory and cannot give rise to a unilateral contract but noting exceptions holding that a conditional acceptance can be manifested merely in a partys conduct holding that both the state and the defendant are bound to the terms of a plea agreement under santobello holding that the offerors signature on the offerees conditional acceptance bound the offeror to all the terms therein holding purchaser of software product was bound by terms of shrinkwrap agreement upon opening the packaging of the product reasoning that a vendor as master of the offer may invite acceptance by conduct and may propose limitations on the kind of conduct that constitutes acceptance a buyer may accept by performing the acts the vendor proposes to treat as acceptance