Periodic taventory Using FIFO, UFO, and Weighted Average Cost Methods The units of an item avallatle for sale during the year were as folloms: There are 20 units of the Aem in the phyical imventory at December 31. The periodic ieventory 5ystem is used. Determine the irwentory cost ising (a) the first in, first out (Fifo) method; (b) the last in, first-out (GIFO) method; and (c) the wighted areage cost method (Round per unit cost to two decimal places and your final answer to the nearest whole dollar)