Add some extras and. avoid to be taxables

I have a price based of 1 usd and a qty of 100 units, but i’ve created some extra options to add some properties to my product final product.

– Option 1 – 15 usd
– Option 2 – 75 usd

i need that when i checkout the tax was only applied to (1usd x 100 units)

and the extras $15 and $75 they shouldn’t be taxables they just need to be added to the final price… is it possible to do that?