How are these numbers calculated?

Big Games

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

Week of 6/5100.0*Chance in playoffs100.0*Average seed
Argentina 44 Scotland 13 +20.1
+1.9
Argentina 28 Samoa 16 Out
+0.0
Wales 26 Scotland 21 -0.3
-0.0
New Zealand 14 Australia 10 +0.1
-0.0
Wales 42 Samoa 3 -0.1
Ireland 19 Australia 15 -0.1
New Zealand 59 Fiji 6 -0.1
Ireland 46 Fiji 3 +0.1
-0.0
South Africa 97 USA 0 -0.1
South Africa 31 England 24 -0.0
If winner is:HomeDrawAway
Week of 6/13100.0*Chance in playoffs100.0*Average seed
Wales vs Argentina+1.5+2.4-1.6
France vs South Africa+0.3+0.3-0.1
England vs USA-0.0+0.3+0.3
New Zealand vs Ireland+0.0-0.2+0.0

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-Lplayoffs123456789101112Count
261-0-0Out2648274,709,613,598
240-1-0Out100221,556,223
220-0-1Out3049214,709,694,419
Total:Out1724101323139,640,864,240
Games Above .500
Chance Will Make Playoffs