This reminds me of a funny story.
Way back in the early 90s (adopt grandpa voice for this story) we had a project to do in the standard Engineering School maths class. We were given a McDonald's menu, which included prices and nutritional information, and had to work out the most cost effective way of getting a standard dietary intake through the items on the menu.
However, my friends and I, being rather clever and all (
) didn't even need to set up the various equations (and possibly even computer model) to work it out, the answer was as ingenious as it was simple: The most cost effective way to eat from a McDonald's menu, was to eat only the tomato ketchup ... because it is free!
Needless to say, from my undergraduate days until now, I can recall no more than about 2 or 3 times I've eaten McDonalds, always only when taken there by someone else. That stuff barely qualifies as food (except, um... the ketchup, of course!) I remember a few friends of the anarchist / punk / militant vegan variety who used to protest outside the big McDs on Queens Street, in the heart of Auckland.
ah, those were the days!