3) The units of inventory available for sale during the month of June were as follows: June 1 Beginning Inventory 60 units at $40 2400 June 15 Purchase 40 units at $30 1200 June 22 Purchase 20 units at $20 400 There are 20 units of inventory at June 30. Required: Using the Periodic Method, determine the Cost of Goods sold and ending inventory using FIFO, LIFO, and Average Cost. SHOW YOUR WORK