@DrewDad,
Well, that does shed some light on it. Combine that with the fact that McD's uses the lowest quality materials whenever possible, and it's easy to see why a burger is so cheap, I guess.
Whereas it's hard to use low-quality lettuce, say, and get people to keep buying your salads. You can't fake it as easily as they do the 'meat.'
Thanks, great informative graphic.
Cycloptichorn