Periodic Inventory by Three Methods The units of an item available for sale during the year were as follows: Jan. 1 Inventory 1,035 units $134 Feb. 17 Purchase 1,385 units $136 Jul. 21 Purchase 1,615 units o $139 Nov. 23 Purchase 1,150 units $139 There are 1,225 units of the item in the physical Inventory at December 31. The periodic inventory system is used. Do not round intermediate calculation and round final answer to nearest whole value. a. Determine the inventory cost by the first-In, first out method. $ 214,060 x b. Determine the inventory cost by the last in, first-out method. 160,450 X c. Determine the inventory cost by the weighted average cost method. $ 168,000 X