Are your numbers strictly tuition, or tuition/room/board/fees? Where I went to school, you have no choice but to pay room and board for the first two years. Oddly enough, it takes two years to establish residency in this state. Funny how that rule prevents anyone from getting in-state tuition, even though they spend 4 years living in this state...
If you went by strictly tuition, then where I went to school, the tuition is ~$900 per semester. Everything else is (mandatory) fees and room/board. There was a program a while back that rewarded students who performed well on state standardized testing with 'free tuition' to any state college/university. That's great, except now you have to come up with the other $23,000 to actually go there. And it's even worse than that; tuition is not retained on the campus, it's paid into the state general fund. The state government then decides how much it's going to give back to the university, and as you've probably guessed, it's not all of it. So, realistically, the state only loses like $800 a year or so by waiving 'tuition' to the well-performing students.
In looking at the numbers just now, it looks like they've started charging students in Engineering disciplines and Honors students more than everyone else. Yes, let's reward the student who wants to study something useful like Engineering or wants to distinguish themselves from their peers with "with Honors" after their degree with higher tuition! Captive audience and all that. (Incidentally, had I been in the Honors program, I would have graduated summa cum laude. But, since I didn't do the extra classes or pick the 'special' Honors study groups, I only got 'cum laude'.)