FIFO and LIFO Costs Under Perpetual Inventory System The following units of an item were available for sale during the year: Beginning inventory Sale First purchase Sale Second purchase Sale 40 units at $41 12 units at $64 15 units at $43 21 units at $66 30 units at $44 12 units at $68 The firm uses the perpetual inventory system, and there are 40 units of the item on hand at th a. What is the total cost of the ending inventory according to FIFO? X b. What is the total cost of the ending inventory according to LIFO?