I couldn't find UF's athletic department budget for 12-13, but you can find the 09-10 one by visiting Jeremy Foley's wikipedia entry. Which makes me think the Forbes story is oddly simplistic.
1. UF got $6.4 million in tv rights from the SEC that year. The Department kicked back $6 million into the UF general fund that same budget year. So for that year, they were effectively already funding the computer science and, I dunno, romance languages department. Would not be surprised if there was a similar contribution to the general fund again.
2. In that budget year, there was a big push for cost containment and everyone was urged to try to cut 10% from expenses. But there are some thing that are going to inherently grow if you're fully funding scholarships. That budget notes a $1.4 million increase in scholarship funding due to tuition increases (ie. hold harmless scholarship numbers in existing sports) and add 14 scholarships for women's lacrosse. So figure that at least a million of this year's increase is simply maintaining the same number of funded scholarships slots because they've got to count their 15% tuition increase there.