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 R896 000. (4 marks) 3.1.3 Calculate the expected total Contribution Margin and Operating Profit/Loss, if the selling price increases to R260 per unit. (4 marks) 3.1.4 Villa Limited wants to eliminate the variable selling costs by employing a salaried sales force. If the company sells 10 000 units, how much