hi, please assist with the above questions

REQUIRED Study the information provided below and answer the following questions independently: 3.1.1 Calculate the margin of safety (in units). (4 marks) 3.1.2 Use the contribution margin ratio to determine the level of sales in Rands to obtain an operating profit of R896000. (4 marks) 3.1.3 Calculate the expected total Contribution Margin and Operating Profit/Loss, if the selling price increases to R260 per unit. 3.1.4 Villa Limited wants to eliminate the variable selling costs by employing a salaried sales (4 marks) force. If the company sells 10000 units, how much could it pay in salaries for the sales staff and still have an operating profit of R896 000 ? INFORMATION (4 marks) Villa Limited manufactures and sells its own brand of air filters. Each air filter sells for R250 and the expected annual sales are 5000 units. The accountant has provided the following projected data: The variable manufacturing costs and variable selling costs are estimated at R50 unit and 10% of sales respectively. Fixed manufacturing costs and fixed selling expenses are expected to be R450000 and R188 750 per year respectively. REQUIRED The information provided below refers. Suppose Ascot Limited wants to earn an operating profit of R2 700000 from the battery sales. How much can it afford to spend on the variable manufacturing costs per unit, if the production and sales equal 40000 units? (4 marks) INFORMATION Ascot Limited is confident that it can make and sell a new battery with a prolonged life for cellular phones. The management anticipates the market demand for the new battery to be 40000 units per year if the battery is priced at R450 per unit. Variable administration and marketing costs are expected to amount to R120 per unit. The company's accountants and engineers estimate that fixed costs to be R1 350000