Dear all,

I have column A with different references (e.g. LC43029, AG4499, B213344)
and column B with how many of each reference I have in my stocks. Now, I have
many different stocks and would like to sum up the values of column B
corresponding to each reference.

For instance:
AG4499 3
LC43029 1
AG44991 2
AG4499 2
AG4499 5
LC43029 4

Value for AG4499 = 3+2+2+5 = 12
Value for LC43029 = 1+4 = 5

How can I do that?

A thousand of thanks!