Periodic Inventory by Three Methods The units of an item available for sale during the year were as follows: Jan. 1 Inventory 1,065 units @ $136 Feb. 17 Purchase 1,425 units @ $137 July 21 Purchase 1,620 units @ $138 Nov. 23 Purchase 1,135 units @ $139 There are 1,210 units of the item in the physical inventory at December 31. The periodic Inventory system is used. 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. Do not round intermediate calculation and round fin to the nearest whole dollar