Sure, I agree there are probably some half-useful middle ground solutions. There are thousands of different sales tax rates in the US that change multiple time

Sure, I agree there are probably some half-useful middle ground solutions. There are thousands of different sales tax rates in the US that change multiple times per year. Each city, county, state and other things like metro transit districts, water districts and school districts can all contribute to the sales tax rate paid by an individual at the point of sale.