Shane Durbin wanted to have a recording studio custom$-$built in his home. He sent invitations to a number of local contractors to submit bids on the project. Rory Amstel submitted the lowest bid, which was $$20,000$ less than any of the other bids Durbin received. Durbin called Amstel to ascertain the type and quality of the materials that were included in the bid and to find out if he could substitute a superior brand of acoustic tiles for the same bid price. Amstel said he would have to check into the price difference. The parties also discussed a possible start date for construction. Two weeks later, Durbin changed his mind and decided not to go forward with his plan to