Given the following data, calculate the cost of ending Inventory using the average cost method(Round any intermediary and final answers to two decimal places.) Date Item Unit 1/1 Beginning inventory 70 units at $30.00 per unit 3/5 Purchase of inventory 30 units at $10.00 per unit 5/30 Purchase of inventory 20 units at $22.00 per unit Ending inventory 30 units 12/31 A. $620.10 B. $710.10 C. $440.00 D. $300.00