Book Show Me How Periodic Inventory by Three Methods The units of an item valable for sale during the year were as follows an. 1 nventory units 531 Feb. 17 Purchase 17 units $33 July 21 Purchase 19 units $36 Nov 23 Purchase 18 units 535 There are a units of the item in the physical inventory at December 31. The periodic inventory system is tused a. Determine the inventory.cost by the first-In, tout method Is. Determine the inventory cost by the last in first out method. c Determine the inventory cost by the weighted average cost method. Round average unit cost to the nearest cent and final answers to the nearest whole dollar, if required. Check My Work Previous O ir E 257 PM 75F