Following are the details form the records of a company Opening Stock of inventory 4000 units of 10 RO each. 02.04.2018 Purchased 6000 units at 12 RO each. 08.07.2018 Sales 7000 units @ 15 RO each. 15.09.2018 Purchased 8000 units at 13 RO each. 25.12.2018 Sales 4000 units @ 20 RO each.

Determine the cost of ending inventory on hand at the year-end and cost of goods sold using a) FIFO b) LIFO and c) Average methods