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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 sales​ 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?

Respuesta :

texaschic101
mail : 4(63.40 + 6.80 + 7.56) = 4(77.76) = 311.04
the store : 368(1.88) = 691.84

so Mary saved (691.84 - 311.04) = 380.80 <==
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. 

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