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. Do not round your intermediate calculations.$)$

$\backslash$table$[[,$Company A$,$Company B$,$Company C$],[$Sales$,$$$,380,000,,$$$,740,000,,,550,000,],[$Net operating income,$$,34,440,,$$$,48,000,,,99,000,],[$Average operating assets,$$,164,000,,,,,,154,000,],[$Return on investment $($ROI$),,21,\%,2,,,18,\%,,64,\%$