Jan. 1 Inventory Aug. 13 Purchase 12 units at $38 $456 5 units at $40 200 Nov. 30 Purchase 6 units at $41 246 Available for sale 23 units $902 There are 9 units of the item in the physical inventory at December 31. The periodic inventory system is used. Determine the inventory cost using the (a) first-in, first-out (FIFO) method; (b) last-in, first-out (LIFO) method; and (c) 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