P2.4 The following information is taken from a perpetual inventory record. Perpetual Inventory Control Record Description: M&B Supreme Date Purchase Received Issued Sales Units Unit Cost $10.00 June 1 Balance forward $10.50 $11.00 $ 9.50 For each of the following inventory valuation methods, calculate the value of ending inventory and the cost of sales as of June 30. Use formats of Exhibits 2.4(a), 2.4(b), and 2.4(c). a. First-in, first-out method b. Last-in, first-out method c. Weighted average method