REQUIRED Use the information provided below to answer the following questions: ( 4 marks) 4.1 Calculate the break-even quantity. ( 3 marks) 4.2 Calculate the break-even value using the marginal income ratio. ( 3 marks) 4.3 Calculate the margin of safety (as a percentage). 4.4 Calculate the number of units that must be sold to achieve a net profit of R480000. ( 4 marks) 4.5 Calculate the expected total Marginal Income and Net ProfitLoss in each of the following independent cases: 4.5.1 If advertising is increased by R60000 and the sales volume is expected to increase from 500 units to 600 units. (3 marks) 4.5.2 A decrease in the selling price by R360 and an increase in salespersons' salaies by R120 000 is expected to increase sales by 250 units. (3 marks) INFORMATION Bengal Manufacturers makes a single product and the management accountant has provided the