The math on this is easy after making a few assumptions.
First, let's assume that if Iowa keeps KF as coach that average attendance falls to 65,000/game. That's nearly 6,000 unsold tickets. If you put the average price at $75 (that's taking into account the lower cost for student tickets, the standard cost of $55 for a "regular" ticket, and the higher cost of a sideline ticket that includes seat licensing), then you are looking at $450,000 in lost ticket/seat license revenue per game. Multiply that number by 7 home games and you're at $3,150,000. In addition, I'm guessing that the average concession per fan is $15. I'm sure that's low, but let's use it anyway. That's an additional $90,000/game in lost concessions multiplied by 7 home games comes to $630,000. Figure a 50% margin after taking away the cost of food plus any royalties and that's $315,000 per year in lost concession revenue to the university. Total lost gameday revenue per year comes to $3,465,000. Multiply that number times the 6 years left on his deal after this year and that comes to $20,790,000 in total lost revenue from attendance dropping to 65,000/game. That doesn't account for lost donations, lost ad revenue, etc, etc. To me, if it costs the University almost $21M to keep him, but $17M to let him go, then to me it's a no-brainer.....you terminate him after this season if things haven't turned around.