Well, that is a funny site. Not going to give great information, but still, their results are good for a laugh. I'm a little dubious as how its legal for them to accept samples for analysis. But whatever, a cute site. Notice their FAQ disclaimer -- they can't accurately quantitate illegal drug components. Because to do that, they'd need a USP distributed standard, and analyze that along side the unknown sample. And they're not licensed for that. *I'm wrong here, see below* See? This is where the costs for chemical analysis comes from.
*EDIT*
I shoulda read more carefully. They are licensed to perform analyses, but DEA regulations don't allow them to share the info. Still, you get an idea for the source of hidden costs for an analytical laboratory.