What is the purpose of the sanctioning bodies in boxing? What are the things that they do? How much do they charge for their services?

Who is on a boxer's payroll? Basically if a boxer made 300,000 gross for a fight, how much does he have to pay out and to whom? Also does he get a portion of the pay-per-view sales and live gate?

What is the average training length for a fight? What is an average training regiment for that time? For example, do you do sparring for three days and weights for two and take a couple of days off. Or do you do a combination of those things everyday.

Can someone describe what it feels like to be "rocked" and how you fight through it. Also can someone describe the effect on the body during a grueling fight. For example its hurts to throw a punch or your arms feel like lead, etc.

Thanks in advance.