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 Aug. 13 Inventory 20 units at $46 $920 Purchase 9 units at $49 441 Nov. 30 Purchase 4 units at $51 204 Available for sale 33 units $1,565 There are 16 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. Welghted average cost method