I would tend to agree with M.Mouse - the accounting would of course differ with each airline regarding the cost of the beer, pax ticket costs to cover food not consumed, etc, etc.. but fact remains that these things do add up. And with the state of the airline industry being as tenuous as it is, who's to say that all those beers won't eventually amount to a serious chunk of change that even a big company can't ignore? Beer is cheap. I buy my own, thank you very much.