P2.4 The following information is taken from a perpetual inventory record. Unit Cost $11.00 2. $11.50 Perpetual Inventory Control Record Description: M & B Supreme Date Purchase Received Issued Sales Units June 1 Balance forward 3 4 6 8 9 9 3 6 12 2 4 15 6 10 18 2 8 20 3 5 22 6 11 25 2 9 28 $12.00 $12.50 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 Ex- hibits 2.4(a), (b), and (c). PROBLEMS 95 a. First-in, first-out method b. Last-in, first-out method C. Weighted average method