Periodic inventory by three methods The beginning inventory at Midnight Supplies and data on purchases and sales for a three-month period ending March 31 are as follows! 1. Determine the imventory on March 31 and the cost of goods sold for the three-month period, using the first-in, first-out method and the Inventory, March 31 - Cost of goods soid s 2. Determine the inventory on March 31 and the esst of goods sold for the three-month period, Using the last-in, first-out method and the Inventory, March 311 Cost of goods sold st x 3. Determine the inveatory on March 3 s and the cost of goods sold for the three month period, Uaino the weighted average cost method Inventory, March as s Cost of goods soid s