Given the following data, calculate the cost of goods sold using the average cost method. (Round any intermediary and final answers to two decimal places.) Date Item Unit 1/1 Beginning inventory 40 units at $15 per unit 4/11 Purchase of inventory 25 units at $20 per unit 10/1 Purchase of inventory 40 units at $25 per unit 12/31 Ending inventory 45 units O $1,000.00 O $1,400.00 $900.00 $1,200.00