Westerville Company reported the following results from last year’s operations: Sales $ 1,400,000 Variable expenses 680,000 Contribution margin 720,000 Fixed expenses 440,000 Net operating income $ 280,000 Average operating assets $ 875,000 This year, the company has a $300,000 investment opportunity with the following cost and revenue characteristics: Sales $ 480,000 Contribution margin ratio 80 % of ...