Acceptance Law

Case:

Grayson signed a roofing contract with Clay Tile, agent for Sure-Seal Roofing, to have a new roof put on his house. The agreement stated that the contract was subject to Sure-Seal's approval and that it would become binding upon written notice of acceptance or commencement of work. Nine days later, Clay Tile loaded up his truck and drove to Grayson's house, only to find that someone else was already doing the job. Sure-Seal sued arguing that Grayson had broken his promise (breached the contract). Grayson said that a contract had not been formed.

Case question

1)Specifically, what is the evidence showing that acceptance did or did not occur?

2) Who should win and why