The following data are for the Akron Division of Consolidated Rubber, Inc.: Sales $ 820,000 Net operating income $ 59,000 Average operating assets $ 320,000 Stockholders' equity $ 82,000 Residual income $ 22,000 For the past year, the minimum required rate of return was: Multiple Choice 44.00% 11.56% 23.10% 7.20%