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:

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$,$$$,9,540,000,,$$$,7,900,000,,$$$,5,310,000,],[$Net operating income,,,,$$,342,000,,,,],[$Average operating assets,$$,3,180,000,,,,,$$$,2,124,000,],[$Return on investment $($ROI$),,14,\%,,18,\%,,.,\%$