How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 12/4100.0*Average seed
Extraordinary G 112.19 HertzVanRentals 90.03 -0.1
Pack Attack 113.18 Kevin Cadles Ba 97.92 -0.1
Gotham Rogues 107.04 Wacko for Flacco 115.47 +0.1
Week of 12/11100.0*Average seed
Kevin Cadles Ba 89.4 Fairy Princess 105.77 -0.6
Extraordinary G 116.93 Gotham Rogues 106.7 +0.2
Maybe Monkeys 104.77 Pack Attack 109.1 -0.0
Games Above .500
Chance Will Make Playoffs