Inventory Costing Methods and the Perpetual Method Kay & Company experienced the following events in March: Date Event Units Unit Cost Total Cost Mar. 1 Purchased inventory 100 @ $16 $1,600 Mar. 3 Sold inventory 60 Mar. 15 Purchased inventory 100 @ 18 $1,800 Mar. 20 Sold inventory Assume the perpetual inventory system is used. Use the weighted average inventory costing method to calculate the company's cost of goods sold and ending inventory as of March 31. Round weighted average cost per unit to two decimal places. Use rounded answer for subsequent calculations. Round all other answers to the nearest dollar. March 3 Cost of goods sold 50 x March 20 Weighted-average cost per unit 5 0 x Cost of goods sold Ox March 31 Total cost of goods sold $ 0x Ending inventory 50 x