QUESTION 3 (20 Marks) 3.1 REQUIRED: Calculate the value of closing inventory as at 31 December 2019 and gross profit for the year ended 31 December 2019 using the weighted average cost method. (Round off the average cost per unit to two decimal places and the income statement figures to the nearest Rand) (9 marks) Use the format of the Statement of Comprehensive Income to present your answer. INFORMATION: Compu Mania, a cell phone accessory company's inventory records are presented in the table below: Closing inventory of 220 units at R80 each on 31 December 2018 120 units at R88 were purchased on 15 March 2019 140 units at R90 were purchased on 15 July 2019 100 units at R94 were purchased on 10 September 2019 During the year (Jan-Dec 2019) 500 units were sold at R160 each 3.2 REQUIRED: 3.2.1 Calculate the incremental profit/loss after tax. 3.2.2 Determine the incremental return on sales if these new customers are accepted. (8 marks)