Discrepancy in school cost

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In the break down I have it says roughly 40592 per year(in state). My estimates are for dental students admitted into Fall 2007 so its pretty recent. You also have to keep in mind that most students get financial aid as well which may be where your number comes from.
 
Also almost all in state dental schools are good value schools. So if you are in NY the best value would be Buffalo and Stony Brook.