Ferris Company began January with 6,000 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 5,000 $ 9 Total Cost $ 45,000 Jan. 18 6,000 10 60,000 Totals 11,000 $105,000 * Includes purchase price and cost of freight. Sales Date of Sale Units Jan. 5 3,000 Jan. 12 2,000 Jan. 20 4,000 Total 9,000 8.000 units were on hand at the end of the month.