How are these numbers calculated?

Big Games

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

Week of 10/2100.0*Chance in playoffs100.0*Qualified100.0*Average seed
Chile 2 Ecuador 1 +19.0
+26.8
+1.2
Argentina 0 Peru 0 +1.7
+1.0
+0.0
Venezuela 0 Uruguay 0 -0.5
-0.3
Colombia 1 Paraguay 2 -4.1
-0.2
Bolivia 0 Brazil 0 +0.0
Week of 10/10100.0*Chance in playoffs100.0*Qualified100.0*Average seed
Brazil 3 Chile 0 Out
-36.9
-1.0
Ecuador 1 Argentina 3 -14.0
-9.3
-0.3
Paraguay 0 Venezuela 1 +3.7
+10.6
+0.3
Peru 1 Colombia 1 +3.7
+5.7
+0.3
Points
Chance Will Make Playoffs