Given a table of exam grades and corresponding marks as below, how do I sum a
series of grades?

E.g if grades are A*,A, C & D how do I total the marks of 58, 52, 40 and 34.
Assume data is columns B to J with (some) blank column entries.

TIA.



Codes Marks
A* 58
A 52
B 46
C 40
D 34
E 28
F 22
G 16
U 0