Claire purchases a new dress for the prom. The dress is priced $160, but it is on sale for 30% off. Claire's aunt works at the store and can give her an additional 10% off.

If the sales tax is 7.5%, how much does Claire pay for the dress?

a. $93.24

b. $103.20

c. $108.36

d. $120.40

If you would like to know how much does Claire pay for the dress, you can calculate this using the following steps:

on sale for 30% off:

30% of $160 = 30% * 160 = 30/100 * 160 = $48

$160 - $48 = $112

an additional 10% off:

10% of $112 = 10% * 112 = 10/100 * 112 = $11.2

$112 - $11.2 = $100.8

the sales tax ... 7.5%

7.5% of $100.8 = 7.5% * 100.8 = 7.5/100 * 100.8 = $7.56

$100.8 + $7.56 = $108.36

The correct result would be c. $108.36.