Share 'Agents and P2P Sites?'

Hello, I have recently read about having agents for p2p sites.  How does this work?  Once you send in an audition and are chosen for the gig, do you then forward everything to your agent?  On some sites you must provide a quote with your audition.  How then does that work?  Do you work with your agent to get the correct quote (including their commission should you be chosen for the job) and then…