total all 3 prices:
300 + 150 + 90 = $540 total is what she needed to pay.
they paid a 15% deposit so multiply the total by 15%:
540 x 0.15 = $81 ( amount of deposit)
to find what she still needs to pay, subtract the deposit amount from the total amount:
540 - 81 = $459
The answer is C
