I have an extremely good idea of how much I've spent, and it's fairly minimal. It's a hell of a lot less than most posters have spent on a single knife. My knife needs have mostly been met by a few gift knives. Past those, knives are a luxury and everything else comes first. I'm a broke college student, and I'd rather have lunch for a couple months than go hungry with a shiny new knife in my pocket.
What would I have spent it on? Probably food, alcohol, and ammo, although certainly not much of any of it.