from http://floridarevenue.com/taxes/taxesfees/Pages/sales_tax.aspx
Sales tax and discretionary sales surtax are calculated on each taxable transaction. Florida uses a bracket system for calculating sales tax when the transactions fall below or in between whole dollar amounts. Multiply the whole dollar amount by the tax rate (6% plus the county discretionary sales surtax rate)
There are 22 counties in Florida, so I only have 22 different sales tax zones that I need to worry about.
Sales tax is ONLY calculated on a COUNTY basis.
I think you like to make things overly complex.
Tom