14. 12/01 Beginning Inventory 12/10 Purchase 12/20 Purchase 12/31 Ending Inventory 100 units @ $6/unit 100 units @ $8/unit 200 units @ $10/unit 150 units Assuming that a periodic inventory system is used, what is the Costs of Goods Sold under the LIFO method? a) $1,000 b) $1,500 c) $2,400 d) $1,900