From the following particulars find out the value of closing stock when materials are issued under Simple Average Method: 2007 Jan. 39 : : : " 1 5 10 15 20 Balance Received Issues Issues Received 2,000 units Rs. 10,000 3,000 units @ Rs. 6 per unit 3,500 units 500 units 2,000 units @ Rs. 7 per unit