Given the following data, calculate the cost of goods sold using the lifo costing method. date item unit 1/1 beginning inventory 14 units at $20 per unit 3/18 purchase of inventory 12 units at $22 per unit 6/20 purchase of inventory 9 units at $25 per unit 9/27 purchase of inventory 30 units at $26 per unit 11/27 purchase of inventory 25 units at $27 per unit 12/31 ending inventory 49 units