The units of an item available for sale during the year were as follows: Jan. 1 Inventory 14 units at $48 $672 Aug. 13 Purchase 18 units at $50 900 Nov. 30 Purchase 20 units at $51 1,020 Available for sale 52 units $2,592 There are 26 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) $fill in the blank 1 b. Last-in, first-out (LIFO) $fill in the blank 2 c. Weighted average cost