#3 please help

Westerville Company reported the following results from last year's operations: Sales Variable expenses Contribution margin Fixed expenses Net operating income Average operating assets $ 1,500,000 690,000 810,000 435,000 $375,000 $ 1,250,000 At the beginning of this year, the company has a $350,000 investment opportunity with the following cost and revenue characteristics: Sales Contribution margin ratio Fixed expenses $ 420,000 70% of sales $ 252,000 The company's minimum required rate of return is 10% 3. What is last year's return on investment (RON)? (Round your intermediate calculations to 1 decimal place.) ROI %