Mary purchased 4 tires by mail order. She paid $46.40 per tire plus$4.20 per tire for shipping and handling. There is no salestax, because the tires were purchased out of state. She also had to pay$8.75 per tire for mounting and balancing. At a localstore, Mary's total for the 4 tires with mounting and balancing would be $276 plus 7% sales tax. How much did Mary save by purchasing the tires through themail?

Mary saved $ ? on the purchase of 4 tires.