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 6 units at $47 $282 Aug. 7 Purchase 20 units at $48 960 Dec. 11 Purchase 12 units at $50 600 38 units $1,842 There are 18 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