Question 20 The units of an item available for sale during the year were as follows: January 10 February 27 Inventory 27 units @ $67 Purchase 54 units @ $98 July 11 Purchase 63 units @ $101 November 13 Purchase 36 units @ $112 10 pts There are 50 units of the item in the physical inventory at December 31. The periodic inventory system is used. Determine the ending inventory cost by (a) the first-in, first-out method, (b) the last-in, first-out method, and (c) the average cost method. Show your work.