Using Perpetual inventory system

Unit January 1 March 28 August 22 October 14 Goods Available for Sale Transaction Beginning Inventory Purchase Purchase Purchase UnitsCost Total Cost 10 S60 S 600 1,320 1,400 1,900 20 20 25 75 70 76 S 5,220 The company sold 25 units on May 1 and 20 units on October 28. Required: Calculate the company's ending inventory and cost of goods sold using the each of following inventory costing methods a. FIFO b. LIFO c. Weighted Average