Number of Unit Units Price Cost June 1 Beginning Inventory 16 $ 25 $ 400 June 5 June 21 Purchase 44 $ 30 $ 1,320 Purchase 70 S 33 $ 2,310 Available for sale 130 $ 4,030 Units sold 78 Ending inventory 52 4. Assuming that a periodic inventory system is used, what is the cost of ending inventory under the average cost method? a. $2,418 b. $1.716 c. $1,480 d. Some other amount