Green signed a roofing contract with Clay Tile, agent for Ever-Tite Roofing Company, to have a new roof put on his house. The agreement stated that this contract was subject to Ever-Tite’s approval and that the agreement would become binding upon written notice of acceptance or commencement of work. Nine days later, Clay Tile loaded up his truck and drove to Green’s house, only to find that someone else was already doing the job. Ever- Tite wishes to sue on the contract for damages. Was Green’s offer to Ever-Tite accepted before the offer was revoked?