Required information [The following information applies to the questions displayed below.J Westerville Company reported the following results from last year's operations: Part 1 of 15 Sales Variab Contribution margin Fixed expenses Net operating income Average operating $ 937,500 assetS $1,500,000 le expenses 730,000 770,000 470,000 300,000 points eBook Print At the beginning of this year, the company has a $362,500 investment opportunity with the following cost and revenue characteristics: References Sales Contribution margin ratio Fixed expenses $580,000 70 $319,000 % of sales The company's minimum required rate of return is 10%. Required 1. What is last year's margin