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 13 units at $25 Aug. 7Purchase 18 units at $26 $325 468 420 $1,213 Dec.1 Purchase 15 un Dec. 11 Purchase units at $28 46 units 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 (a) the first-in, first-out (FIFO) 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) a. First-in, first-out (FIFO) b. Last-in, first-out (LIFO) c. Weighted average cost