Hey You!
STEP 1: 5.00 + 1.36 = 6.36
STEP 2: 23.56 - 6.36 = 17.20.
STEP 3: 17.20/2 = 8.60
STEP 4: (This is optional, but to check your answer, you can multiply and add):
8.60 × 2 = 17.20 // 17.20 + 6.36 = 23.56
So, you answer is: 1 sweater cost $8.60 before tax and discount coupon.