Cumberland Co. sells $900 of inventory to Hancock Co. for cash. Cumberland paid $639 for the merchandise. Under a perpetual inventory system, which of the following journal entry(ies) would be recorded? a. debit Accounts Receivable, $900; credit Sales, $900; and debit Cost of Merchandise Sold, $639; credit Merchandise Inventory, $639 b. debit Cash, $639; credit Sales, $639 c. debit Cash, $900; credit Sales, $900; and debit Cost of Merchandise Sold, $639; credit Merchandise Inventory, $639 d. debit Cash, $900; credit Merchandise Inventory, $639