Click and scroll down to see prices:

https://secure.drivenasa.com/event/899

You'd want "HPDE1" for $359 + $45 NASA membership, it is explained here: http://www.nasaracing.net/hpde.htm

Hope it helps,

Jon

ps- or you could do "Hyperdrive" for $50 + membership not required (a Hyperdrive is one intro classroom session and one HPDE1 equivalent track session with an instructor on Saturday, instead of six of each spread across the weekend if you enter HPDE1.)