During December, the company completed the following transactions. Dec, 7 Received $3,640 cash from customers in payment of account (no discount allowed). 12 Purchased merchandise on account from Green Co. $12,800, terms 1/10,n/30. 17 Sold merchandise on account $15,600, terms 2/10,n/30. The cost of the merchandise sold was $10,200. 19 Paid salaries $2,030. 22 Paid Green Co. in full, less discount. 26 Received collections in full, less discounts, from customers billed on December 17. 31 Received $2,650 cash from customers in payment of account (no discount allowed). Journalize the December transactions. (Assume a perpetual inventory system.) (Credit account titles are automatically indented when amount is entered. Do not indent manually. Record journal entries in the order presented in the problem.)