Periodic Inventory by Three Methods The units of an item available for sale during the year were as follows: Jan. 1 Inventory 5 units at $33 Feb. 17 Purchase 7 units at $35 Jul 21 Purchase 9 units at $36 Nov 23 Purchase 19 units at $38 There are 16 units of the item in the physical inventory at December 31. The periodic Inventory system is used. Round average unit cost to two decimals and final answers to the nearest whole dollar, If required a. Determine the inventory cost by the first in, first-out method, Determine the inventory cost by the lastin, first-out method, 11111 c. Determine the inventory cost by the weighted average cost method