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:

company a company b company c

sales 390000 760000 530000

net operating income 42000

average operating assets 156000 148000

return on investment 16 percent 17 percent

minimum required rate of return

percentage 15 13

dollar amount 47000

residual income 7000