please help with this question

A family friend has asked your help in analyzing the operations of three anonymous companies operating in the same service sector industry. Supply the missing data in the table below: (Loss amounts should be indicated by a minus sign. Round your percentage answers to nearest whole percent) Company A B C Sales $ 320,000 $ 760,000 $ 590,000 Net operating income $ 55,000 Average operating assets $ 153,000 $ 158,000 Return on investment (ROI) 17 % 19 % % Minimum required rate of return: Percentage 17 % % 12 % Dollar amount $ 42,000 Residual income $ 6,000