Andy, the owner of a window-washing business, instructed his secretary to make an offer to Deluxe Apartments, to wash all the windows of the apartment buildings for $5 per window. The total cost of the project to be paid as soon as the work was completed. Deluxe Apartments accepted the offer.
Later, Andy sent a signed letter to Deluxe Apartments directing them to make the payment for the window washing work to his daughter, Sally. Andy completed the window washing work, and demanded that the payment be made to him. What are the rights of the parties? Please explain.