(b) Net profit ratio Sales RO 300,000 Sales returns RO 10.000 Opening stock RO 70,000 Closing stock RO 25,000 Direct expenses RO 40,000 Purchases RO 140,000 Net profit RO 40,000 Share Capital RO 100,000 Reserve and Surplus RO 25,000 Long term Loans RO 50,000