Periodic Inventory Using FIFO, LIFO, and Weighted Average Cost Methods TEe units of an item avaibable for sale during the year were as follows: There are 18 units of the item in the piyvical inventory at December 31 . The periodic irventory system is used, Determine the inwentory cost using (o) the first-in, first-out (FIFO) method; (b) the last-in, frst-out (UFO) method; and (c) the weighted average cost method (Round per unit cost to two decimal places and your final answer to the nearest whole dollar)