he following units of an item were available for sale during the year: Beginning inventory 28 units at $45 Sale 23 units at $70 First purchase 30 units at $48 Sale 27 units at $71 Second purchase 27 units at $51 Sale 24 units at $73 The firm uses the perpetual inventory system, and there are 11 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?