Concept:Opening capital is the net worth of the business at the start of the period, calculated as total assets minus total liabilities.Explanation:Use the figures for 31/12/08 because they represent the opening balances. List the assets at 31/12/08: furniture and fittings N21,000, office equipment N9,800, debtors N6,800, and cash at bank N7,000. Add these assets: N21,000+N9,800+N6,800+N7,000=N44,600. The only liability at 31/12/08 is creditors of N4,900. Now subtract the liabilities from the total assets: N44,600−N4,900=N39,700. The accrued electricity bill belongs to 31/12/09, so it is not used in finding the opening capital.Answer:A. N39,700