>Have committed to $22MM of protein I've never understood this convention and it always causes my brain to short-circuit when trying to read it. Is that $22 Million Monies, or $22 MegaMillions I'm assuming that the shorthand is supposed to be read as: $22 Million So then I spend the next 5 minutes stuck in a feedback loop of what the hell am I supposed to be thinking.
M is the Roman numeral for 1000, so MM is a thousand thousands, in other words a million.
I believe the M (in $100M) also isn't based in roman numerals but is a convenient dual meaning of Mega- (the metric 10^6 prefix) and the first letter of million.