The trial balance of Mwiya, a sole trader, as at 31st December 2012 was as follows: Capital 2 Debit Credit K K 69,585 Land and buildings 60,000 Office equipment at cost 13,000 Motor vehicles at cost 18,000 Drawings 10,100 Sales and purchase returns 1,250 1,000 Carriage in 750 Carriage out 1,125 Inventory as at 1.1.2012 9,000 Bank 1,200 Sales and purchases 101,000 142,360 Motor expenses 2,400 Provision for doubtful debt 240 Provision for depreciation: Land and buildings Office equipment Motor vehicles Sundry expenses Wages and salaries Debtors and creditors Telephone and insurance Bank loan 2,400 1,300 3,600 2,760 12,500 10,200 10,000 2,200 15,000 245,485 245,485 You are given the following additional information: Closing inventory, as at 31.12.2012, K10,200 Depreciation is to be charged as follows: Land and buildings Office equipment Motor vehicles Wages owing K1,200 1% straight-line method 10% straight-line method 20% reducing balance method 3 Insurance paid in advance 200 Provision for doubtful debts is to be maintained at 5% of debtors. Required: (a) Prepare the Statement of comprehensive income for the year ended 31st December 2012 taking into account the notes to the trial balance and (9 marks) (b) the Statement of Financial Position as at 31st December 2012. (9 marks) (a) Discuss four (4) errors that cannot be detected by preparing a Trial Balance. (2 marks) (Total: 20 marks)