How can I tax items based on their volume of liquid? There is a 5 cent per milliliter tax on electronic cigarette e liquid in North Carolina.
I have to add 5 cents of tax per milliliter of eliquid I sell in North Carolina. I need to be able to tax 30ml @ $1.50, 60ml @ $3, 100ml @ $5 etc. Is there any way to do this?
Edit: To clarify, I am not filling bottles with a custom amount of liquid, the bottles are pre-filled to 30ml,60ml,100,ml etc.I just need to be able to charge tax based on size or volume, not a % of the sale price. I.E. A 30ml bottle that's $12.99 and one that is $19.99 have the same volume (30ml) of eliquid. So they would both be charged $1.50 tax because 30 x 5 cents is $1.50