Aeriode Inventory using Firo, UFO; and Weighted Avergge Cost Methods The units of an item avaliable for sale during the year were as follows: There are 23 units of the item in the physical inventory at December 31 . The periodic inventory system is used. otetermine the inventory cost using the (a) first-in, firstout (fifo) method; (b) inst-h, firt-out (ufo) method; and (c) weighted average cost method (round per-unit cost to two dedimal places and your firal answer to the nearest whole dollar)