Ferris Company began January with 4,000 units of its principal product. The cost of each unit is $8. Merchandise transactions for the month of January are as follows: Purchases Date of Purchase: Units Unit Cost Jan. 10 3,000 $ 9 Jan. 18 4,000 10 Totals 7,000 *Includes purchase price and cost of freight. Sales Date of Sale Units Jan. 5 2,000 Jan. 12 1,000 Jan. 201 3,000 Total: 6,000 5,000 units were on hand at the end of the month. Total Cost $27,000 40,000 67,000 Problem 8-5 (Algo) Part 5 5. Calculate January's ending inventory and cost of goods sold for the month using Average cost, perpetual system. (Round average cost per unit to 4 decimal places. Enter sales with a negative sign.)