How to set up Parent/Child relationship in Campaigns

How to set up Parent/Child relationship in Campaigns

I want to run a campaign, this campaign will have child-campaigns.
say, 

                                             Master Campaign (parent)
            _________________________|_________________________________________
            |                         |                            |                            |                                |
Campaign A     Campaign B         Campaign C        Campaign D             Campaign E


Each one of my campaigns will have some revenue generated. I want to display summation of all child Campaign's revenue on my Master Campaign Revenue.

Kindly suggest if it's possible by any mean.
Thanks