Really, this is cultural. I don't know anyone it bugs, to just look at the tag and add the tax in their head. I could make some quip about math skills, but I

Really, this is cultural. I don't know anyone it bugs, to just look at the tag and add the tax in their head. I could make some quip about math skills, but I know people in the EU, etc aren't lacking. Which is why this is cultural.