$130 total for this race if it is your first time and your membership for FTR is good through June of 09. Your membership to FTR gives you access to all 4 series. Enduro, HS, QS, and MX.
Like Spectech said, QS#9 is not an AMA/ATVA sanctioned event so you don't have to join that, but I would so you can race the ones that are.