The developer signed the form and returned it to the driller, who neglected to sign it but promptly began drilling the well ' at the proposed site on the developer's project; After drilling for two days, the driller told the developer during one of the developer's daily visits that he would not nish unless the developer would agree to pay twice the price recited in the written proposal. The developer refused, the driller _ quit, andthe developer hired a substitute driller to drill the well to completion for a price of $7,500. In an action by the developer against the driller for damages, which of the following is the probable decision