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 Purchase Nov. 30 Purchase Available for sale 15 units at $36 $540 6 units at $39 234 10 units at $40 31 units 400 $1,174 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) f 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 yo 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 $ X X X