Harry and Sally are competing Toyota dealers. Theyorally agreed on the purchase of 10 Prius hybrid cars for $150,000.Harry mailed Sally a signed written memo confirming the transaction, asking that she sign and return it to him. After she received the memo, Sally put it away in her desk. Thirty days later, the market price of oil has dropped sharply so Harry decides to back out of the deal. Sally sues Harry for breach of contract. He defends saying, "You never signed anything." Who wins and why?