engage Learning-Google Chrome AssignmentMain.do?invoker-&takeAssignmentSessionLocator=assignment-take&tinprogress=false Calculator The units of an item available for sale during the year were as follows: 27 units $90 January 10 Inventory 54 units $98 February 27 Purchase July 11 63 units $106 Purchase November 13 Purchase 36 units S115 There are 50 units of the item in the physical inventory at December 31. The periodic inventory system is used. a. Determine the ending inventory cost by the first-in, first-out method. b. Determine the ending inventory cost by the last-in, first-out method. c. Determine the ending inventory Cost by the average cost method