Weighted Average Cost Method with Perpetual Inventory The beginning inventory at Midnight Supplies and data on purchases and sales for a three-month period ending March 31 , are as follows: Required: 1. Fecord the inventory, purchases, and cost of merchandise sold data in a perpetual inventory record similar to the one illustrated in Exhibit S, using the weighted o decimal places, if necessary. 3. Determine the ending inventory cost as of March 31. in Exhibit 5, using the weighted average cost method, Round unit cost to two decimal places, if necessary