$40 it looks like.
Suggest you familiarize yourself with your State's website.
You should probably check your local zoning ordinances, too, while you are doing your research.
and locally, there's supposedly a shortage of one of the test reagents, getting it thru the State was the only available supply, I've heard. Atypically for me, I can't provide a link to source that, its just a rumor I'm reporting.