A given class has a specific number of credit hours, generally 3 credit hours for a 15-week semester class that meets for 150–160 minutes per week. So ‘fees per credit hours’ means that a three credit hour class would charge three times the credit hour fee…say $200 /credit hour would make the class $600. If you took 15 hours credit (5 3-hour classes) the bill would be $3,000.