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 11 units at $4,500 $49,500 Inventory Purchase Aug. 7 17 units at $4,600 78,200 Dec. 11 Purchase 10 units at $4,800 48,000 38 units $175,700 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 (a) the first in, first-out (FFO) method; (b) the last in, first-out (LIFO) method; and (c) the weighted average cost method (Round per unit cost to two decimal places and your final answer to the nearest whole dollar). First-in, first-out (FIFO) b. Last-In, first-out (FO) C Weighted average cost