Joe was a salesman, newly hired by Radio Hut, and on his first day on the job, he was left in charge of the store while the manager and the other salesmen went to lunch. They specifically told him not to sell anything over $50.00 but to just tell the customer to come back in an hour when they would be returned. While they were at lunch, a customer came in and decided to purchase a new stereo TV set and several other accessories. The total sales price was $1,600.00 and the customer couldn’t wait. Joe sold them the merchandise including a $400.00 discount. When the customer returned the next day to pick up the goods, the manager refused to go through with the deal. Explain the manager's legal obligations in these circumstances.