How are these numbers calculated?

Big Games

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

Week of 8/14100.0*Chowder Cup100.0*Average seed
AngerManagement 3 BlackstoneValleyBravest 4 +24.3
+0.7
OldBoys 5 BladesofSteel 3 -1.5
+0.2
Week of 8/21100.0*Chowder Cup100.0*Average seed
OldBoys 0 BlackstoneValleyBravest 1 Yes
+0.5
Points
Chance Will Make Playoffs