For example say you had 2 beers (each 5% by volume) and 3 wine coolers (3% by volume each), how much total alcohol would you have? Or would you have to settle for averaging the two and expressing it by volume?
If you have no idea what I'm trying to say, how gross is the above pairing of beer and wine coolers? Beer before liquor, never been sicker, beer before wine coolers.... you're kind of a loser! :)