Weighted Average Cost Flow Method Under Perpetual Inventory System The following units of a particular item were available for sale during the calendar year: Jan. 1 Inventory Mar. 18 Sale May 2 Aug. 9 Purchase 15,000 units at $60.00 12,000 units 27,000 units at $62.00 Oct. 20 Sale Purchase 22,500 units 10,500 units at $64.20 The firm uses the weighted average cost method with a perpetual inventory system. Determine the cost of merchandise sold for each sale and the inventory balance after each sale. Present the data in the form illustrated in Exhibit 5. Round unit cost to two decimal places, if necessary. Perpetual Inventory Account Weighted Average Cost Flow Method Purchases Cost of Merchandise Sold Inventory Date Quantity Unit Cost Total Cost Quantity Unit Cost Total Cost Quantity Unit Cost Total Cost Jan. 1 Mar. 18 May 2 Aug. 9 Oct. 20 Dec. 31 Balances