Periodic Inventory by Three Methods The units of an item available for sale during the year were as follows: Jan. 1 Inventory Feb. 17 Purchase 1,060 units @ $140 1,375 units @ $142 1,660 units @ $144 July 21 Purchase Nov. 23 Purchase 1,145 units @ $145 There are 1,220 units of the item in the physical inventory at December 31. The periodic inventory system 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 cale dollar