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 $650 13 units at $50 19 units at $52 Aug. 13 Purchase 988 Nov. 30 Purchase 13 units at $53 689 Available for sale 45 units $2,327 There are 18 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) méthod; (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) CI Weighted average co