A family friend has asked your help in analyzing the operations of three anonymous companles operating in the same service sector Industry. Supply the missing data in the table below. $($Loss amounts should be Indlcated by a minus sign. Round your percentage answers to nearest whole percent.$)$

$\backslash$table$[[\backslash$table$[[],[$Sales$]],$Company$],[$A$,$B$,$c$],[$$$,9,210,00,,,,7,350,000,,$$$,4,815,000,],[$Net operating income,,,,,,$300,000,,,,],[$Average operating assets,$$,3,070,00,,,,,,$s$,1,926,000,],[$Return on investment $($ROI$),,1,\%,,,12,\%,,,\%$