Periodic Inventory Using FIFO, LIFO, and Weighted Average Cost Method. The units of an item available for sale during the year were as follows: Jan. 1 Inventory $450 15 units at $30 19 units at $31 Aug. 13 Purchase Nov. 30 Available for sale 589 Purchase 11 units at $32 352 45 units $1,391 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 finat answer to the nearest whole dollar). First-in, first out (FIFO) b. Last-In, first-out (LIFO) III c. Weighted average cost