well, to correct your math, 3x60 is 180, but guess what is really funny, its gonna be easier to boost in this game than in cod 5. just think about tactical insertion...
The math I did was if you were keeping one game.
Games ordered=3
Games Needed=1
Extra Money Spent(out)=2*60=$120.
But the insertion would only be good if IW hasn't exactly thought that through as of yet.