The following units of an inventory item were available for sale during the year: Beginning inventory First purchase Second purchase Third purchase 12 units at $52 16 units at $55 20 units at $59 15 units at $57 The firm uses the periodic inventory system. During the year, 42 units of the item were sold. The value of ending inventory using LIFO is a. $1,743 b. $1,119 c. $624 d. $1,431