a) Calculate the Contribution Margin and Operating Income for the year. . ( 2 marks) b) Calculate the contribution margin ratio. . (2 marks) c) Calculate the break-even sales and break-even units. . (2 marks) d) Suppose the company would like to generate an operating profit of $90,900. Determine the revenue that is needed to obtain this target and calculate the number of units that need to be produced to meet this goal. . (2 marks) e) Given the company's current yearly sales amount is $455,000, what is the margin of safety in dollars and in units? ( 2 marks)