Westerville Company reported the following results from last years operations: Sales $ 1,400,000 Variable expenses 720,000 Contribution margin 680,000 Fixed expenses 470,000 Net operating income $ 210,000 Average operating assets $ 875,000 At the beginning of this year, the company has a $350,000 investment opportunity with the following cost and revenue characteristics: Sales $ 560,000 Contribution margin ratio 70 % of sales Fixed expenses $ 336,000 The companys minimum required rate of return is 15%. Foundational 11-4 (Algo) 4. What is the margin related to this years investment opportunity