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 70 units at $30 per 1/1 Beginning inventory unit Purchase of 30 units at $10 per 3/5 inventory unit Purchase of 10 units at $22 per 5/30 inventory unit 12/31 Ending inventory 30 units $300.00 $714.60 $620.10 O $220.00