1837 	100 100  98 115 104 A+
2285 	100 100  99  50  88 B+ 
2683 	 59  82  81  35  65 C   
3588 	 97  74  92  63  82 B
4440 	 78  95 100  57  83 B         
4495 	 93  90  45  58  72 C+
4513 	 73 100 100  60  84 B
4741 	100 100 100  70  93 A
5459     76 100  99  30  77 B-
8376 	100 100 100 105 102 A+
9877 	 76 100  99  60  84 B

column explanations
(1) student number
(2,3) midterms
(4) homework
(5) final
(6) average of (2)-(5)
(7) grade