75 kg crap............ 42 kg salau...............1 389 lei
25 kg crap.............50 kg salau...............1 075 lei |x3
75 kg crap.............150 kg salau..............3 225 lei
75 kg crap.............42 kg salau................1 389 lei
_______________________________________( - )
//............................108 kg salau................1 836 lei
1 kg salau = 1836 : 108 = 17 lei
1 kg crap = (1 389 - ( 42 x 17):75= (1 389 - 714):75=
= 675:75 = 9 lei
1 kg salau = 17 lei
1 kg crap = 9 lei