Moving to another question will save this response. Question 10 The following data pertain to STC's operations last year Sales $ 900,000 Net operating income $ 36,000 Contribution margin $ 150.000 Average operating assets $ 180,000 Stockholders' equity $ 100,000 Plant, property, & equipment $ 120,000 If the residual income for the year was $9.000, the minimum required rate of return must have been 20% 15% 36% Moving to another Question will save this response