Journalize the following transactions and adjusting entries, assuming the perpetual inventory system, no beginning inventory, LIFO cost flow method. (Chart of Account : Cash, Inventory, Accounts Receivable, Accounts Payable, Sales Revenue, Sales Return, Cost of Good Sold)

-Dec. 3 Purchased 4,000 units of inventory on account at a cost of $2 per unit. -Dec. 5 Sold 3,500 units of inventory on account for $3 per unit. -Dec. 7 Granted the December 5 customer $600 credit for 200 units of inventory returned costing $400. These units were returned to inventory -Dec. 17 Purchased 2,200 units of inventory for cash at $2.5 per unit -Dec. 22 Sold 500 units of inventory on account for $3.5 per unit