[The following information applies to the questions displayed below.] Ferris Company began January with 7,000 units of its principal product. The cost of each unit is $9. Merchandise transactions for the month of January are as follows: Purchases Date of Purchase Units Unit Cost* Total Cost Jan. 10 6,000 $ 10 $ 60,000 Jan. 18 7,000 11 77,000 Totals 13,000 137,000 * Includes purchase price and cost of freight. Sales Date of Sale Units Jan. 5 3,000 Jan. 12 1,000 Jan. 20 4,000 Total 8,000 12,000 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.