Westerville Company reported the following results from last year's operations: Sales Variable expenses Contribution margin Fixed expenses Net operating income Average operating assets $ 2,000,000 640,000 1,360,000 860,000 $ 500,000 $ 1,250, eee At the beginning of this year, the company has a $250,000 investment opportunity with the following cost and revenue characteristics: Sales Contribution margin ratio Fixed expenses $ 400,000 70% of sales $ 220,000 The company's minimum required rate of return is 10%. 11. What is last year's residual income? Residual income