Periodic Inventory Using FIFO, LIFO, and Weighted Average Cost Methods Jan. 1 666 Available for sale 47 units The units of an Item available for sale during the year were as follows: Inventory 19 units at $35 $665 Aug. 13 Purchase 18 units at $32 Nov. 30 Purchase 10 units at $39 390 $1,721 There are 19 units of the item in the physical inventory at December 31. The periodic inventory system is used, Determine the inventory cost using the (a) first.in, first-out (FIFO) method; (b) last In, first-out (LIFO) method; and (c) Weighted average cost method (round per-unit cost to two decimal places and your final answer to the nearest whole dollar) a. First in, first out (FIFO) b. Laut in, first-out (LIFO) Weighted average cost C