Reply #28: Actually we have a pretty good idea: about $50 billion total

[Recursion]

Some of it was loaned out daily (not even loaned out, really; the "window" was just broadened and the money stood as guarantees for the commercial paper market every day). Some of that was even removed from the supply when the warrants were liquidated. The remainder ($30 billion or so) went into asset purchases. Chump change compared to the two QEs the Fed has done.