Comparative data on three companies in the same service industry are given below.

Required:

$2.$ Fill in the missing information.

Note: Round the "Turnover" and "ROI" answers to $2$ decimal places.

$\backslash$table$[[,,,,,$Sompany,,,,$],[,,$A$,,,B,,,$C$,],[$Sales$,$$$,3,192,000,,$$$,981,000,,,,],[$Net operating income,$$,414,960,,$$$,156,960,,,,],[$Average operating assets,$$,1,680,000,,,,,,3,190,000,],[$Margin$,,,\%,,,\%,,6,\%$