A+: at instructor's discretion
A : 81 and up
A-: 74 and up
B+: 70 and up
B : 63 and up
B-: 58 and up
C+: 54 and up
C : 49 and up
C-: 45 and up
D : 30 and up
F : below 30

The instructor reserves the right to increase grades, in unexpected
circumstances (for example, a final exam was unexpectedly difficult).