30 bucks if I recall correctly, and you have 30 days to perform the update, so don't sit on it and forget you have it or they'll charge you the full amount. Use the included return sticker to ship it back.
Side note: For anyone wondering or happens across my site these past few days I'm doing some things on my PC that takes all it's resources so my site has not been updating. No concern though it's totally self inflicted.