Mary purchased 4 tires by mail order. She paid $63.40 per tire plus $6.80 per tire for shipping and handling. There is no sale
s tax, because the tires were purchased out of state. She also had to pay $7.56 per tire for mounting and balancing. At a local store, Mary's total for the 4 tires with mounting and balancing would be $368 plus 88% sales tax. How much did Mary save by purchasing the tires through the mail?
The answer I got was $380.80 for the total amount that she saved. I did $63.40 times 4, $6.80 times 4, and $7.56 times 4. Then I added the numbers and subtracted the result from $368 plus the 88% sales tax.
