Credit and credit hour are synonymous.
Average undergraduate tuition for in-state students for 2012-2013 is $6,170, based on a course load of 30 credit hours (15 per semester, which is about 5 classes, a fairly normal load). That works out to about $205 per credit hour, but that includes the additional fees and other expenses (health fee, lab fees, etc). Out of state tuition is $12,590 for the same course load, or about $419 per credit hour.
Those numbers will vary a little based on how many credits your daughter is taking and what fees, if any, are associated with her classes.
Here is a link explaining the various components of each year's Estimated Cost of Attendance. http://www.sfa.ufl.edu/basics/cost-of-attendance/
Hope that helps!