Feb. 17 Purchase Periodic Inventory by Three Muthods The units of an item avalable for sale during the year were as follows: Jan. 1 Inventory 7 units at $46 19 units at $48 Jul. 23 Purchase 12 units at 549 Nov 23 Purchase 18 units at 149 There are 28 units of the Item in the physical inventory at December 31, me periodic Inventory system is used. Round average unit cost to one decimal and final answers to the nearest whole dobar, If required. Determine the inventory cout by the first in, est ut method. b. Determine the inventory cost by the fast-in, Tirut-out method. c. Determine the inventory cost by the weighted average cost method