Classic breakout pattern, page-40

The Company is confident that the first cashflow can be achieved for a capital cost less than US$500,000 and the C1 operating costs are expected to be less than US$0.50/lb Zinc after by-product credits.

Quote taken from announcement on 6/9/18

I think this means the 3rd party processing plant is being given the lead, silver and gold (by-product credits) in return for the low .50/lb zinc processing.
Please correct me if I am wrong. I was unsure on the the take of this also