Unfortunately, how much you pay to recycle is hidden, in your taxes. You kinda need to know how much your cities pays for the recycling, vs trash, for each kind of material. Probably possible, but not easy. (But we know you can get paid for metals.)
In this case, it sounds like GP is using a private garbage collection service because their municipality does not provide garbage collection services (as is common in rural areas).
One would expect that the costs in that situation are likely to be more representative of the actual cost to dispose of the material, as the company can't obscure its economic reality with taxes.
