just for general information: Kodak gives a 30% discount to teachers and students, so if you are in the education business, this helps a lot

I order the 400 ft roll on the phone (Kodak Customer Service (800) 621-FILM (3456)) and tell tham that i will pick it up from their warehouse in Mississauga/Toronto, hence i save on shipping and brokerage.
plus i get the teachers' discount being a teacher/school administrator.

Something to help the cost per roll down ...