Add the grades of Exam 1 (0-200pts) and Exam 2(0-333pts).
Let G= Exam1 + Exam 2.
  455 <= G <= 533   A range
  375 <= G <= 455   B range (B or B+)
  265 <= G <= 375   C range (C or C+)
   0  <= G <= 265   F range

Oct 31, 2017