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by callmeal 2298 days ago
If you live in the San Francisco Bay area, sales taxes in SF are 8.5% Tax rates in Oakland are 9.25%. South San Francisco: 9.75% Mountain View: 9% Humboldt County: 7.75% Sonoma: 8.75%

The mental effort is not in the calculation but in figuring out what the tax rate is where you are. There really is no excuse for retailers not listing "tax-included" prices.