Audio Express Co. uses perpetual inventory system and records purchases of merchandise at net cost. The company recently purchased 200 CDs at an invoice price of $6,000 and term of 2/10, n/30. Half of these discs were incorrectly labeled and were returned immediately to the supplier, If the discount period has expired, the journal entry to record payment of this invoice includes a a. debit to Merchandise Inventory for $3,000. b. Credit to d Credit to cash for $3,000