They should've told you at the interview. They gave me a sheet with a break down of tuition and cost of living for the 4 years at my interview:
(OOS)
-D1:
tuition and fees: 50,397
+ Room and Board, personal, transportation=79,496.50
-D2
T&F: 47,397
+ R, B, P, T=71,267
-D3
T&F: 47,397
+ R, B, P, T=68,731
-D4
T&F: 44,127
+ R, B, P, T=65,216
I was also told that these numbers is what the gov't goes by in determining aid and loans for both tuition and living expenses.