Periodic Inventory Using FIFO, LIFO, and Weighted Average Cost Methods The units of an itens avadable for sale luning the year were as follows: Jan. 1 Aug. 71 Inventory Purchase Dec. 11 Purchase 10 units at $3,00 $33,000 19 units at $3,400 64,600 13 units at $3,600 42 units 40,000 $144,400 There are 17 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 (ro) method; (b) the last in, first-out (FO) 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). de First in, first-out (FIFO) b. Last-in, first-out (LIFO) G Weighted average cost