B+ = 86.5% - 89%
B = 82.5% - 86%
B- = 79.5% - 82%
C+ = 76.5% - 79%
C = 72.5% - 76%
C- = 69.5% - 72%
D+ = 66.5% - 69%
D = 59.5% - 66%
F = 0% - 59%