I enrolled in certificate program that takes 6 months but classes only take 9 hours per week. The university issued the I-20 bec. they said it's considered a full-time course but I understand that I should attend classes for 18 hours per week at least. I'm afraid to have problems at the consulate when they read how much the tuition is since they will realize a full time class for 6 months can't be so cheap.... What should I say if they ask?