Sheila owns the 'Buzz' Coffee Shop. Every day her friend Melissa visits her shop, spending about 5 minutes there looking at the pastries and usually buying one or two muffins or bagels before leaving.One afternoon, Melissa goes into the shop, looks at the items, and picks up a $3 chocolate muffin. She waves the muffin at Sheila without saying a word and walks out.

Is there a contract? If so, explain how would it be classified, meaning how was it formed, how is it performed and is it enforceable?