W&W Company just received a shipment of 42 washing machines. The invoice list price for each washing machine is $405. The manufacturer's catalogue indicates that W&W can take the following discounts 30/15/10 with 30 percent being the normal mark up, 15 percent for free delivery and hook up, and 10 percent for local advertising and point-of-sale displays. If W&W does not advertise this brand of washer and charges $0 for delivery and set up, the company will pay the vendor ? for each washing machine.