Periodic Inventory by Three Methods The units of an item available for sale during the year were as follows: Jan. 1 Inventory 1,100 units @ $136 Feb. 17 Purchase 1,390 units @ $138 Jul. 21 Purchase 1,520 units $141 Nov. 23 Purchase 1,125 units @ $143 There are 1,200 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. b. Determine the inventory cost by the last-in, first-out method. c. Determine the inventory cost by the weighted average cost method. Periodic Inventory by Three Methods The units of an item available for sale during the year were as follows: Jan. 1 Inventory 1,100 units @ $136 Feb. 17 Purchase 1,390 units @ $138 Jul. 21 Purchase 1,520 units $141 Nov. 23 Purchase 1,125 units @ $143 There are 1,200 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. b. Determine the inventory cost by the last-in, first-out method. c. Determine the inventory cost by the weighted average cost method