Great Value, is a local grocery store, Great Value sells customized cakes. On Wednesday, Great Value receives an order from Mandy, to purchase 16 chocolate cakes, for $20 each. Monday afternoon, Great Value submits an acceptance in the U.S. Mail, by copying the completed form and writing "Accepted, will have your order ready by next week, Great Value" at the bottom of the form. On Wednesday, Great Value receives an email from Mandy, attempting to withdraw the original offer from Wednesday.
1. Do the parties have a contract?
2. Explain why or why not.
3. What contract doctrine(s), if any, would apply?