There is no need for such obscure calculations.

The fluoride issue is very simple.
Remove the fluoride from drinking water and put as much as you wish in your own glass of water.
The rest of us then won't be forced to consume it. Everyone will be happy with freedom of choice.

AND think of the saving of tax money. 

Only 5% of the world and only 3% of Europe fluoridate their drinking water (U.S. 74%).