had the following transactions during December, the last month of the accounting period Dec. 1 Sold merchandise on credit for $6,000, cost $4,000 terms 1/10, 1/30 3 Purchased merchandise for cash, $900. 4 Purchased merchandise on credit for $4,600, terms 2/10, 1/30. 5 Issued a credit memorandum for $500 to a customer who returned merchandise purchased November 29, com $300 11 Received payment for merchandise sold December 1 15 Received a credit memorandum for $500 for the return of faulty merchandise purchased on December 4 18 Paid freight charges of $100 for merchandise ordered last month. 23 Paid for the merchandise purchased December 4 lets merchandise returned 24 Sold merchandise on credit for $8,000, terms 110 n 30 cost $6,500. 31 Received payment for merchandise sold on December 24 (1) Prepare general joumal entries to record these transactions, using a perpetual inventory system. (2) Prepare general journal entries to record these transactions, using a periodic inventory system