Excel-Vlookup : lookup value repeated + add column value for similar lookup values

Question

I'm struggling with a formula, in fact I don't know where to start. I'm ok with Vlookup when it's easy stuff, but this one is tough for me and don't even know to put it in words. But I'll try.

So, basically, I have a raw data that I extract from Analytics for my campaigns (performance per hours), so my campaigns names are repeted. I want to crate a formula that will allow me to extract all revenues from my campaigns and return the total revenu for each one.

I've created a small example to illustrate my need:

Thank you in advance,