A retailer of home-cleaning products instructs its salespeople sell its product by visiting residences of prospective customers during the day. One salesperson visits a house and leaves a box of assorted cleaning products at the door together with a note that says: "Please make payment in the amount of $350 within 10 days. If you do not return the products within 24 hours you will be deemed to have agreed to purchase them." If the customer finds the box, reads the note, keeps and uses the cleaning products with the intent to accept the salesperson's offer, has the customer accepted the offer to purchase the cleaning products? Explain your answer.