The following marks are used for undergraduate courses (the number weight assigned to each grade for computation of grade point averages (GPA) is listed in parentheses when applicable): A (4.0), A- (3.7), B+ (3.3), B (3.0), B- (2.7), C+ (2.3), C (2.0), C- (1.7), D+ (1.3), D (1.0), F (0.0), I, P, Q, and W. The marks A, B, C, D, and P are passing marks and confer course credit. The mark F indicates unsatisfactory work and does not confer credit. A grade of F may not be subsequently changed, except when entered in error by the instructor or the registrar.