How are these numbers calculated?

Big Games

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

Week of 8/19100.0*Chowder Cup100.0*Average seed
GVC 4 BeerThrashers 1 Yes
BeerThrashers 3 GVC 0 -2.4
MiddlesexOffenders 2 ElderSkatesmen 6 +1.9
Week of 8/26None
Week of 9/3None
Chance Will Make Playoffs