Assist on how to answer the atta

Mary commenced business in January 2019, manufacturing a single product. At the end of 2019 she calculated her profit using the absorption costing method and was pleased with the prots that were realised. However, she recently read that preparation of the income statement according to the marginal costing method would be more benecial to her. She also learnt that if there are opening or closing inventories, then the prots calculated using the two methods would be dierent. She forecasted her sales and costs for July to December 2021 and wanted to undertake cost-volumeprot (CVP) analysis since it made use of the marginal costing approach with which she was impressed. QUESTION 1 (20 Marks) REQUIRED Prepare the Income Statement of Mary's Manufacturers the year ended 31 December 2020 using the: 1.1 Marginal costing method. (10 Marks) 1.2 Absorption costing method. (10 Marks) INFORMATION The following information was extracted from the accounting records of Mary's Manufacturers for the years ended 31 December 2020 and 31 December 2019: 31 December 2020 31 December 2019 Units R Units R Sales for the year 3 500 ? 3 700 666 000 Selling price per unit Production for the year Finished goods at beginning of year Variable manufacturing costs per unit Variable selling and administrative costs per unit Fixed manufacturing costs per year Fixed selling and administrative costs per year Additional information 1. Mary's Manufacturers uses the FIFO method for the valuation of inventory. 2. The increase in the fixed manufacturing costs is due to a new rental agreement in respect of the factory