How are these numbers calculated?

Big Games

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

Week of 8/13100.0*Average seed
Bulldogs 60 Cats 161 -0.5
Dockers 87 Swans 96 +0.1
Kangaroos 63 Saints 115 -0.0
Week of 8/20100.0*Average seed
Swans 114 Bulldogs 70 -0.1
Saints 115 Tigers 94 -0.0
Week of 8/27None
Games Above .500
Chance Will Make Playoffs