Whatever, I'm sure he will get some community service and avoid a criminal record. He's only a kid after all. Good luck getting into a decent college/university with a rap like that on your school record though (I guess he could hack in and remove it, but that might not be a good idea). Not that somebody with Cs, Ds, and Fs is going to be getting into any college anyways.
They're just adding up all of the maximum sentences that he could technically get. First of all, he's a minor, and second, it never actually works like that. Do people that download a couple thousand MP3s go to jail for thousands of years and pay billions of dollars in fines?