Ed, a businessperson, is a friend of Fran, the owner of a Percolated Coffee & Baked Goods store. Every day, Ed spends five minutes in Fran's store, looking at the goods and usually buying one or two cinnamon buns or bagels. One afternoon, Ed goes into the store, looks at the items, and picks up a $1 chocolate brownie. Ed waves the brownie at Fran without saying a word and walks out. Is there a contract? If so, how would it be classified in terms of formation, performance, and enforceability?