1) I -did- pay the $30 that it mentions near the end. That's not much of a mystery.
2) Previous bill? It was $200 more, due to the initial visit being unregistered. Where that $200 owed vanished off to? I've no clue.
3) $70-something paid from insurance? I -have- no insurance; that's why I'm going through PCHC.
I'm hardly complaining, but still... it's a little odd for an expected $300+ bill to mysteriously shrink down to $30.