Periodic Inventory by Three Methods The units of an item available for sale during the year were as follows: Jan. 1 Inventory 1,000 units at $120 Feb. 17 Purchase 1,375 units at $128 July 21 Purchase 1,500 units at $136 Nov. 23 Purchase 1,125 units at $140 There are 1,200 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 final answer to the nearest whole dollar. Check My Work All work saved. Save and Exit Previous Next Submit Assignment for Grading