Please include steps and explanations

Required: Prepare an Income Statement of Company Alfex as at 31 Dec. 2020. a) Write off (in minus) of short-term financial assets 9 000 b) Other costs by nature 4 000 c) Change in inventories of traded goods + 2 000 d) Revenue from sale of building 50 000 e) Income tax 10% f) Revenue from sale of traded goods 12 000 g) Retained profits from previous years 10 000 h) Accumulated depreciation of building 49 000 i) Historical cost of building 102 000