The 6% that I used was the average from around ten years ago, so I'm sure it has gone up since then. I don't think many people realize that you can be hit with a sales tax from any/all of the following: State, county, city, municipal, and district. The last two are their own kind of special because they set their own parameters on what even qualifies as a municipality or a district and they can be as lax as "special municipality sales tax" or "special district sales tax" wherein the municipality or district in question is set up by whatever parameters they see fit.