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 11 units at $29 $319 Aug. 13 Purchase 18 units at $30 540 Nov. 30 Purchase 18 units at $31 558 Available for sale 47 units $1,417 There are 19 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