Required information Skip to question [The following information applies to the questions displayed below.] Westerville Company reported the following results from last years operations: Sales $ 1,800,000 Variable expenses 740,000 Contribution margin 1,060,000 Fixed expenses 700,000 Net operating income $ 360,000 Average operating assets $ 1,200,000 At the beginning of this year, the company has a $400,000 investment opportunity with the following cost and revenue characteristics: Sales $ 600,000 Contribution margin ratio 60 % of sales Fixed expenses $ 288,000 The companys minimum required rate of return is 10%. Required: 1. What is last years margin