Why won't these numbers add up? - I've been spending the last two days working on a homework problem for one of my classes, but I just can't the "correct" answer.  I think there's a typo in the book or something.

Speaking of imaginary numbers, the Massachusetts government finds that everytime they check the state coffers for money, there's less than they thought.  Boston Globe: "State revenues continue free fall - Collections at least $300m short."