Answer:
if the sale tax comes first before the 15% off,
Sales Tax: 1360
so the price became 18360
Price Off: 2754
18360 - 2754 = 15606
if the sale tax comes after the 15% off,
Price Off: 2550
17000-2550 = 14450
eight percent of 14450 is 1156
14450+1156 = 15606
anyways, the price is the same no matter if the sales tax comes first or the discount comes first