Sheldorado Aluminum Products sold an aluminum awning to Villette and installed it on the back of his home for use as a carport. There was no formal written contract, but there was a bill of sale. The day after installation, the awning began to leak. Six months later, after a snow storm, the awning collapsed on top of Villette’s new Mercedes. Villette sued for the return of the $3,000 paid to Sheldorado. Should this contract be decided under the UCC or the common law? Why?