Go to Kaplan.com. They will have course schedules and locations. It usually last 4-6 weeks. It costs $999, however you can usually get a discount for early enrollment and for being a member of your schools dental club. Each of these is about $100 off. So you can get the price down to $799. Good luck.
I thought I would look it up for you. It can be tricky navigating around their site if you are unfamiliar with it.
Some good news as well. They are offering a "test drive". You can go in and take a practice DAT and they will score it so you can see where you are at in terms of readiness. Scroll to the bottom of the page and it will give you details. It is towards the end of the month.
Glad I can help. It is pretty daunting getting ready to study for the DAT. Good Luck! Let me know if you have any other questions about Kaplan or study materials in general.