[SOLVED]Extract distinct cells and sum values next to

[nsourm]

Hello to all. I'm having a problem that i can't solve.(i can do it by sorting values, or with pivot table).
I have a table with two columns. In the first column there are cells that appear many times.Next to each cell there is a value.
I want to extract distinct values from the first column and sum next to each distinct extracted cell all the values.


I'm attaching an example

Thanks a lot