In the 1960's, McDonald's advertised the "All-American" lunch: a hamburger, fries, and a shake. The total cost was $0.49. That's right -- forty-nine cents. Of course, a McDonald's hamburger was no bigger then than it is today, so it made a rather skimpy meal, but the "shake" (no mention of "milk" -- never knew what was in it!) must have had enough calories to keep you going all afternoon.