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 -44.5
-0.6
StevesPizza 3 TeamAmerica 6 -21.8
-0.2
TheMightyPylons 4 DC 6 +1.8
+0.1
Week of 8/18100.0*Chowder Cup100.0*Average seed
DC 7 TeamAmerica 5 +41.3
+0.4
Wolverines 4 TheMightyPylons 1 +10.5
+0.1
Week of 8/25None
Points
Chance Will Make Playoffs