Robichau Inc. reported the following results from last year's operations: Sales Variable expenses Contribution margin Fixed expenses Net operating income Average operating assets $6,300,000 4,930,eee 1,370,000 803,00 567,000 $3,800,000 At the beginning of this yearthe company has a $900,000 investment opportunity with the following characteristics: Sales Contribution margin ratio Fixed expenses $1,53e, aee 30% of sales $ 306, 200 The company's minimum required rate of return is 20%. If the company pursues the investment opportunity and otherwise performs the same as last year, the combined ROI for the entire company will be closest to: Multiple Choice 3.9% 21.0% 145% o 18.5%