Jack offers to sell Jill his automobile for $10,000. Jill says she must think about but that she is not rejecting his offer. Jill goes home that day and comes to the realization that $10,000 is a great deal. She sends Jack a letter of acceptance by mail at 4pm by placing it in the drop box at the post office. Jill did not know that Jack had sent her a revocation letter at 3:30 from a different post office. The letter of revocation is scheduled for delivery the next day at 10am. What result