more slang,
2 bits-- from spanish pieces of eight, that were cut into 8 peices! so 2 bits is = to 2/8th or 1/4 or a quarter!
those same peices of eight, gave use the term dollar..
(spanish gold coin was used by many trader/people, and was used in many states both before and after independance, for the first 20 years or so. )
C note = $100--from roman numeral C for 100

and are we sticking to "proper" slang for coins?
if not:

moolah
scratch
loot
green stuff
folding stuff
dead presidents