Question

If something was regularly priced at $60 and was on sale for 30% off. The sales tax was 9%. What is the total coast including the sales tax?

Answer 1

$45.78

Explanation:

Let's write out the required expression:

(1.00-0.30)($60)(1.09) = $45.78 (total cost, including tax)

Note that "30% off" translates into multiplying the original cost by 1.00 - 0.30, or 0.70. Thus, the reduced price is 0.70($60) = $42.

Multiplying this result by 1.09 produces an output which includes both pre-tax cost of the item and the tax itself.