I was not given the breakdown of the sales tax unt...

I was not given the breakdown of the sales tax until the moment I signed the bill of sale. At that time, I asked the finance person why the sales tax was higher than what I calculated (7% + $44 + $36 +$1). I was told that this was because the tax rate was 9.25%. The finance guy turns out wrong. My calculate of taxes was correct. However, there is an additional charge called business tax, which is grouped with sales tax. And this is misleading, since business tax is not what the state or county collects from me. Rather, it's what Toyota charges me to help it pay county tax. Maybe all car dealership does this. I am not complaining about the charge. I just wish it was made clear to me like doc fee.