How are these numbers calculated?

Big Games

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

Week of 9/25100.0*Chance in playoffs100.0*Average seed
South Africa 46 Samoa 6 +29.4
+1.1
Scotland 39 United States 16 -1.1
Week of 10/2100.0*Chance in playoffs100.0*Average seed
South Africa 34 Scotland 16 +34.3
+1.1
Samoa 5 Japan 26 -24.0
-0.2
South Africa 64 United States 0 In
+0.2
Week of 10/9None

What If

Chances based on how well the South Africa finish out the regular season.   Explain

100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-OTLTplayoffs12345Count
120-000In1002,833,757,760
Total:In1002,833,757,760
Points
Chance Will Make Playoffs