Gold, silver, zinc, copper, lead !, page-5

They state in the report that the precious metals are to be recovered and sold separately to the zinc so on that basis I would not bother with any 'equivalent' valuations on the resource.
So on that basis just looking at the precious metals side of it they have 237k oz of gold at a grade of 1.81g/t and 16.2m oz of silver at 124g/t
But with so many different elements present (pb,cu,zn,au,ag) the issue for me is how do they separate all the elements out into an economically viable amount for that resource while keeping the costs down.
And if that can't be done then which of the elements should they focus on to design the mine around?
It's a decent report but it also creates some tricky decisions for the board around what elements to focus on when putting the PFS together.