a. Net Sales = (300 units - 10 units return) * $20 each
Net Sales = 290 units * $20 each
Net Sales = $5,800
b. Liability for refunds = (10 units expected to be returned * $20 each)
Liability for refunds = $200
c. Cost of Goods Sold = (300 units - 10 return) * $12 per unit
Cost of Goods Sold = 290 units * $12 per unit
Cost of Goods Sold = $3,480