Westerville Company reported the following results from last year's operations: Sales $1,800,000 435,000 Variable expenses Contribution margin Fixed expenses 1,365,000 1,005,000 Net operating income $360,000 $1,200,000 Average operating assets This year, the company has a $300,000 investment opportunity with the following cost and revenue characteristics: Sales $360,000 Contribution margin ratio 70% of sales Fixed expenses $ 216,000 The company's minimum required rate of return is 10%. Q2 refer to Westerville above: a. What is last year's margin b. What is last year's turnover c. What is last year's ROI d. What is last year's RI e. What is the ROI related to this year's investment opportunity f. What is the Rl related to this year's investment opportunity