Dear Professor,
After careful examination, the grade I have recieved in your course has come to my attention. I am a student from your Tuesday 8:40 class. After gathering all my exams and other graded material, I calculated what my grade for the course should be and it resulted that I should be recieving a A instead of a B for your class. If possible, I would like to be able to discuss this matter further at your convenience, it would be greatly appreciated. If necessary I shall schedule an appointment or please notify me what would better suit you.
Your time is much appreciated,
Catherine Cespedes