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PE 7-5A Periodic inventory using FIFO, LIFO, and weighted average cost methods OBJ. 4 The units of an item available for sale during the year were as follows: Jan. Inventory 12 units at $5,400 $ 64,800 Aug. 7 Purchase 18 units at $6,000 108,000 Dec. 11 Purchase 15 units at $6,480 97,200 Available for sale 45 units $270,000 There are 14 units of the item in the physical inventory at December 31. The periodic in- ventory system is used. Determine the inventory cost using (a) the first-in, first-out (FIFO) method; (b) the last-in, first-out (LIFO) method; and (c) the weighted average cost method. PE 7-58 Periodic inventory using FIFO, LIFO, and weighted average cost methods OBJ. 4 The units of an item available for sale during the year were as follows: Jan. 1 Inventory 20 units at $360 $ 7,200 Aug. 13 Purchase 260 units at $342 88,920 Nov. 30 Purchase 40 units at $357 14,280 Available for sale 320 units $1 10,400 There are 57 units of the item in the physical inventory at December 31. The periodic in- ventory system is used. Determine the inventory cost using (a) the first-in, first-out (FIFO) method; (b) the last-in, first-out (LIFO) method; and (c) the weighted average cost method