volume tehnica
850.000 ×60%=510.000 volume tehnica
rest volume
830.000-510.000=340.000 volume
volume electrocasnica
340.000 ×30%=102.000 volume electrocasnica
volume domeniu transport
340.000 ×20%=68.000 volume domeniu transport
volume fizica
340.000-(102.000+68.000)=170.000 volume fizica