So, there is no specific data I am currently working, but I am just curious about this kind of problem.

Let's assume my dataframe looks like this:

```
Name                  Number                   Sum
What (feat.Drake)      1A                      100
What                   1A                      100
What (Radio Edit)      1A                      100
What (I Remix)         1B                      200
What (Remastered)      1B                      200

```

This turns into:

```
Name                  Number                   Sum
What (feat.Drake)      1A                      300
What (I Remix)         1B                      400

```

So, what I tried to do there is to sum up the Sum by Number. However, Name cannot be removed, so I kept the first Name that appeared on the dataframe.

Any kind of help will be appreciated!