Question

Mary purchased 4 tires by mail order she paid $63.10 per tire plus $5.20 per tire shipping and handling. there is no sales tax because the tires were purchased out of state. she also had to pay $7.76 per tire for mounting and balancing at a local store, Mary's total for the 4 tires with mounting and balancing would be $340 plus 8% sales tax. how much did mary save by purchasing the tires through the mail ?

Answer 1

Input data

Mary purchased

4 tires

$ 63.10 per tire

$ 5.20 per tire shipping

$ 7.76 per tire for mounting

Mary's total for the 4 tires with mounting and balancing would be $340 plus 8% sales tax.

Procedure

Total in mail

`\begin{gathered} T=4(63.10+5.20+7.76) \\ T=4(76.06) \\ T=304.24 \end{gathered}`

Total in local store

`\begin{gathered} T_s=340+340\cdot8\text{ \%} \\ T_s=340+27.2 \\ T_s=367.2 \end{gathered}`

The difference between the two forms of purchasing is

`\begin{gathered} T_s-T=367.2-304.24 \\ T_s-T=62.96 \end{gathered}`

Mary saved a total of $62.96