Ferris Company began January with 4,000 units of its principal product. The cost of each unit is $6. Merchandise transactions for the month of January are as follows: Purchases Date of Purchase Units Unit Cost* Total Cost Jan. 10 3,000 $ 7 $ 21,000 Jan. 18 4,000 8 32,000 Totals 7,000 53,000 * Includes purchase price and cost of freight. Sales Date of Sale Units Jan. 5 2,000 Jan. 12 1,000 Jan. 20 3,000 Total 6,000 5,000 units were on hand at the end of the month. Required: 1. Calculate January's ending inventory and cost of goods sold for the month using FIFO, periodic system.