REQUIRED Calculate the following: 3.1.1 Break-even quantity. (5) 3.1.2 Break-even value using the marginal income ratio. (4) 3.1.3 Margin of safety (in terms of units). (4) 3.1.4 Expected total marginal income and net profit. (5) INFORMATION Sammy Ltd manufactures calculators. The following information was extracted from the budget for the year ended 31 December 2023: Sales Selling price per calculator Variable production cost per unit Fixed production costs Variable selling and administrative costs per unit Fixed selling and administrative costs 10 400 units R350 R216 R154 000 R29 R82 000