3.1 Calculate the margin of safety (in units). 32 Calculate the total Contribution Margin and Onerating Prnfit/lnss, if the direct materials (4 marks) are expecied to cost R30 per unit more and fixed manufacturing overhead costs are 10% greater than projected. (4 marks) unit remain the same but the break-even quantity changes to 6000 units. (4 marks) 3.4 Lise the coniribution marcin rao to determine the level of saies in Rands required to obtain an operating profit of R1950000. (4 marks) 3.5 Alpha Limited wants to eliminate the variable selling expenses by employing a salaried sales force. If the company sells 14250 units, how much could it pay in salaries to the sales staff and still have a profit of R16800000? (4 marks) INFORINATION Alpha Limited manufactures and sells its own brand of guitars. Each guitar sells for R3 000 and the company expects to sell 12000 guitars during 2023 . The financial manager has provided the following projected data for 2023