A company sells to a customer 4 units of inventory for $80 per unit under terms 4/15, N/30. Assume the company uses the net method for discounts and the perpetual inventory system. What account and amount should be credited if the customer returns 1 unit of inventory? (Ch8) Cr. Purchase returns $80.00 Cr. Purchase returns $76.80 O Cr. Inventory $76.80 Cr. Inventory $80.00