Given the following data, calculate cost of goods sold using the FIFO costing method. Date 1/1 2/25 5/20 8/15 10/17 12/31 Item Beginning inventory Purchase of inventory Purchase of inventory Purchase of inventory Purchase of inventory Ending inventory Unit 28 units at $9 per unit 15 units at $11 per unit 20 units at $11 per unit 15 units at $13 per unit 6 units at $17 per unit 23 units O A. $737 OB. $780 OC. $957 O D. $615