Gerry a plumber is hired under a written contract to refurbish Bryan's master bathroom and Bryan's first floor half bath for $45,000. Bryan gave Gerry a $5,000 check to start. Upon completion of the project Gerry gave Bryan his final invoice. Bryan refused to pay. What can Gerry do to protect his interest and receive his pay? Would your answer change if the contract was to refurbish all the bathrooms at Bryan's grocery store? If yes what changes would you make?