There was no question of mistake on the part of either party before the moment when contract A came into existence. The tender, despite its being the product of a mistaken calculation, could be subject to the terms and conditions of contract A so as to invoke forfeiture of the deposit. There was no error in the sense that the contractor did not intend to submit the tender in its form and substance. Then, too, there was no principle in law under which the tender was rendered incapable of acceptance by the appellant. No mistake existed which impeded the coming into being of contract A. The effect of a mistake upon the formation, enforceability or interpretation of a subsequent construction contract need not be considered in this case. The issue did not concern the law of mistake but the application of the forfeiture provisions contained in the tender documents. The deposit was recoverable by the contractor under certain conditions, none of which was met, and also was subject to forfeiture under another term of the contract, the conditions of which had been met. The omission by the owner to insert the number of weeks specified by the tender in the appropriate blank in the contract had no bearing on the rights of the parties to the appeal and did not stand in the way of the owner’s asserting its right to retain the deposit. Tendering has become the focus of six significant decisions of the Supreme Court. Subsequent to "Ron Engineering", judgments have come down in: