The following data relates to DEK Trading for the year 2017: $ $ Accumulated Depreciation as at 31 December 2016 : Motor Vehicles 2,140 Fixtures and Fittings 1,730 Provision for doubtful debts as at 31 December 2016 750 Cash in hand 300 Cash at bank 4.500 Bank loan (repayable in 2025) 7,000 Discounts received 2.300 Sales returns 450 Purchases retums 700 Inventory at 1.1.2017 17,450 Capital 94,000 Accounts receivable (debtors) and accounts payable (creditors) 20.000 21,500 Purchases and Sales 82.150 152 200 Fixtures and Fittings at cost 21,400 Motor Vehicles at cost 17.300 Wages and salaries 23,010 Rent and rates 4,500 Premises at cost 55 200 Lighting and heating 10.400 Insurance 6,320 Motor vehicle expenses 14,100 Drawings 5,240 282,320 282,320 Notes: (1) Inventory as at 31 December 2017 was valued $20,000 (2) Allowance for doubtful debts as at 31 December 2017 is 4% of accounts receivable (debtors) (3) Motor vehicles are to be depreciated by $3,790 (4) Depreciation charge for fixtures & fittings is 20% per annum using the straight line method (5) Rates prepaid as at 31 December 2017 $500 (6) Wages owing as at 31 December 2017 $890 REQUIRED: (a) Explain the meaning of doubtful debts (b) Income statement for the year ended 31 December 2017 (c) A Balance Sheet as at 31 December 2017