How are these numbers calculated?

Big Games

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

Week of 8/11100.0*Chowder Cup100.0*Average seed
Icemen 4 JunkyardDogs 4 -9.2
-0.1
Week of 8/18100.0*Chowder Cup100.0*Average seed
ScreaminSeagulls 3 Icemen 5 +27.2
+0.3
Nordiques 4 Beavers 3 Yes
+0.1
Week of 8/25None
Points
Chance Will Make Playoffs