FWIW, Iowa itself lists full cost of attendance as $24,464 in state; $46,430 out of state.
I picked two sports at random; baseball, and womens soccer. Baseball had 22 of 35 in state (63%); but soccer was only 9 of 29 (31%). Let's just for the sake of argument say half of their athletes are in state.
So that total actually comes out to about $23 million. But it's not that simple, because that's assuming all 650 athletes are on full scholarship, and that's not even close to the case. I find it hard to believe they spend $2 million on training, I would guess it to be much higher than that. Then there's things you can't put a price on, so long story short, it's not a thing you can probably just calculate.