Westerville Company reported the following results from last year's operations: Sales $2,200,000 Variable expenses 660,000 Contribution margin 1,540,000 Fixed expenses Net operating income Average operating assets 1.0). $440,000 $1,375,000 This year, the company has a $275,000 investment opportunity with the following cost and revenue characteristics $440,000 Sales Cortunii margin rinio Fixed expenses 60 % of sales $220,000 The company's minimum required rate of return is 15%