FIFO and LIFO Costs Under Perpetual Inventory System The following units of an item were available for sale during the year: Beginning inventory 45 units at $41 Sale 11 units at $64 First purchase 36 units at $43 Sale 9 units at $65 Second purchase 28 units at $44 Sale 16 units a The firm uses the perpetual inventory system, and there are 73 units of the item on hand at the end of the year. a. What is the total cost of the ending inventory according to FIFO? $ b. What is the total cost of the ending inventory according to LIFO?