Jan. 1 Purchase Dec. 11 44 units The units of an item available for sale during the year were as follows: Inventory 9 units at $4,500 $40,500 Aug. 7 20 units at $4,800 96,000 Purchase 15 units at $4,900 73,500 $210,000 There are 17 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) method; (b) the last in nest-out (LIFO) method; and (c) ther weighted average cost method (Round per unit cost to two decimal places and your final answer to the nearest whole dollar). 3. First-in, first-out (FIFO) b. Lasti, first-out (LIFO) Weighted average com