0 Required information [The following information applies to the questions displayed below.] Westerville Company reported the following results from last year's operations: Sales Variable expenses $1,400,000 720,000 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 Fixed expenses 70% of sales $336,000 The company's minimum required rate of return is 15%. 11. What is last year's residual income? Residual income