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.$)$

$\backslash$table$[[,$Company$],[,$A$,$B$,$c$],[$Sales$,$$$,9,450,000,,$$$,7,750,000,,$$$,5,175,000,],[$Net operating income,,,,$$,329,000,,,,],[$Average operating assets,$$,3,150,000,,,,,$$$,2,070,000,],[$Return on investment $($ROI$),,11,\%,4,14,\%,,,\%$