Periodic Inventory Using FIFO, LIFO, and Weighted Average Cost Methods The units of an item available for sale during the year were as follows: Jan. 1 Inventory 15 units at $28 $420 Aug. 7 Purchase 18 units at $31 558 Dec. 11 Purchase 14 units at $33 462 47 units $1,440 There are 20 units of the item in the physical inventory at December 31. The periodic inventory system is used. Determine the inventory cost using (a) the first-in, first-out (FIFO) method; (b) the last-in, first-out (LIFO) method; and (c) the weighted average cost method (round per unit cost to two decimal places and your final answer to the nearest whole dollar). a. First-in, first-out (FIFO) b. Last-in, first-out (LIFO) c. Weighted average cost Perpetual Inventory Using LIFO Beginning inventory, purchases, and sales for Item CZ83 are as follows: January 1 Inventory 106 units @ $30 5 Sale 85 units 11 Purchase 118 units @ $34 21 Sale 99 units Assuming a perpetual inventory system and using the last-in, first-out (LIFO) method, determine (a) the cost of merchandise sold on January 21 and (b) the inventory on January 31. a. Cost of merchandise sold on January 21 $ 102 b. Inventory on January 31