I swiped this idea from Penn Live, which recently ranked every SEC team by profit earned from football based on numbers from the U.S. Department of Education (which is also what I used to look at recruiting numbers recently).
I cross-checked OSU’s number with its publicly-available data which you can find here, and the numbers ($42M revenue and $23M expenses) matched exactly. I don’t know where the data is for the other nine teams so I can’t check it, but I presume that if the Dept. of Education got OSU’s correct, then they got the other nine schools’ data correct, too.