E 7-5 p. 333 PE 7-5A Periodic inventory using FIFO, LIFO, and weighted average cost methods sqmo bThe units of an item available for sale during the year were OBJ. 4 as follows: Jan. 12 units at $5,400 $ 64,800 18 units at $6,000 1 Inventory 21 Aug. 7 Purchase 108,000 Dec. 11 Purchase 15 units at $6,480 97,200 c000 Available for sale $270,000 45 units There are 14 units of the item in the physical inventory at December 31. The periodic inventory system is used. Determine the inventory cost using (a) the first-in, first-out (FIFO) eos bnmethod; (b) the last-in, first-out (LIFO) method; and (c) the weighted average cost method. bnuon bE