Weighted average cost flow method under perpetual inventory system The following units of a particular item were available for sale during the calendar year: June 30 Jan. 1 Apr. 19 Inventory 4,000 units at $50 Sale 2,500 units Purchase 4,500 units at $54 Sale 5,000 units Purchase 2,000 units at $56 Sept. 2 Nov. 15 The firm uses the weighted average cost method with a perpetual inventory system. Determine the cost of goods sold for each sale and the inventory balance after each sale. Present the data in the form illustrated in Exhibit 5. Weighted Average Cost Flow Method Date Purchases Quantity Purchases Unit Cost Purchases Total Cost Cost of Goods Sold Quantity Cost of Goods Sold Unit Cost Cost of Goods Sold Total Cost Inventory Inventory Inventory Quantity Unit Cost Total Cost Jan. 1 Apr. 19 June 30 Sept. 2 Nov. 15 Dec. 31 Balances