Also if you enter metal prices you'd also get an instant Gold equivalent (AuEq) or any other metal equivalent grade. This will help you compare it with other known deposits.
Say that you have a porphyry copper-gold deposit. The co reports 0.35% Cu & 0.42 g/t Au. You want to have a copper equivalent grade or a gold equivalent grade to be able to compare it with other similar deposit types, right?
