75 kg crap........42 kg salau.......1 389 lei
25 kg crap.........50 kg salau.......1 075 lei |×3
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 = 1 836 : 108 = 17 lei
1 kg crap = [1 389 -(42×17)]:75 = (1 389-714):75 =
= 675:75 = 9 lei
1 kg salau = 17 lei
1 kg crap = 9 lei