Laiculator Collection - 2020 Spring Term (t) Principles of Periodic Inventory by Three Methods The units of an item available for sale during the year were as follows: Jan. 1 Inventory 1,045 units $126 Feb. 17 Purchase 1,430 units $128 Jul. 21 Purchase 1,550 units $131 Nov. 23 Purchase 1,140 units $132 There are 1,215 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