Supply the missing data for three service companies shown in the table below:

Note: Loss amounts should be indicated by a minus sign. Round your percentage answers to nearest whole percent.

$\backslash$table$[[,$Company$],[,$A$,$B$,$C$.],[$Sales$,$$$,9,120,000,,$$$,7,200,000,,$$$,4,680,000,],[$Net operating income,,,,$$,290,000,,,,],[$Average operating assets,$$,3,040,000,,,,,$$$,1,872,000,],[$Return on investment $($ROI$),,11,\%,,20,\%,,,\%$