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 19 units at $28 $532 Aug. 13 Purchase 11 units at $30 330 Nov. 30 Purchase Available for sale 6 units at $31 36 units 186 $1,048 There are 22 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) method b. Last-in, first-out (LIFO) method c. Weighted average cost method