Hillary bought an outfit for her graduation. The outfit was on sale for 30% off. She saved $36.00.
a) What was the original price of the outfit?
b) How much did she pay for the outfit, including 15% sales tax?
a) $36 must be 30% of the original cost
.30C = 36 where C is the original cost
C = 36 / .30 = $120 original cost
b) Actual cost to her before taxes = 120 -30 = $90
90 * (1.15) = $103.50 = total cost to her after taxes