A retailer makes a $100 sale with terms of 2/10, n/30 on the first of the month. The customer returns $20 of merchandise for credit on account. What journal entry will the retailer record when payment is received within the discount period under a perpetual inventory system? Accounts Payable 80.00 Cash 78.40 Purchase Discounts 1.60 Cash 78.40 Purchase Discounts: 1.60 Accounts Payable 80.00 Cash Sales Discounts Accounts Receivable 98.00 2.00 100.00 Cash 78.40 Sales Discounts 1.60 Accounts Receivable 80.00