Total Loss on Issue = Discount on Issue + Premium on Redemption = (50,000 times 10) + (50,000 times 25) = 5,00,000 + 12,50,000 = 17,50,000.
Securities Premium Reserve available = 30,00,000 times 20 percent = 6,00,000.
Amount debited to Statement of P&L = 17,50,000 - 6,00,000 = 11,50,000.