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
TeamAmerica 5 Wolverines 4 -31.2
-0.4
StevesPizza 3 TeamAmerica 6 -23.6
-0.2
TheMightyPylons 4 DC 6 +3.2
+0.1
Week of 8/18100.0*Chowder Cup100.0*Average seed
DC 7 TeamAmerica 5 +24.8
+0.2
Wolverines 4 TheMightyPylons 1 +24.7
+0.2
Week of 8/25None
Points
Chance Will Make Playoffs