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

Required:

$2.$ Fill in the missing information. $($Round the "Turnover" and "ROI" answers to $2$ decimal places.$)$

$\backslash$table$[[,,1,,$Company,,,$],[,,$A$,,1,$B$,,,$C$,],[$Sales$,$$$,3,382,000,,$$$,1,276,000,,,$E$,],[$Net operating income,$$,608,760,,$$$,191,400,,,-,],[$Average operating assets,$$,1,780,000,,,,,$$$,2,550,000,],[$Margin$,,,\%,,,\%,,4,\%$