How are these numbers calculated?

Big Games

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

Week of 2/17100.0*Average seed
National 19 Crottes 18 +0.2
Mile-Enders 13 Crew 21 +0.0
Week of 2/24100.0*Average seed
National 16 Crew 14 +0.4
Mile-Enders 21 Loonies 9 -0.2
If winner is:HomeHome OTHome SOTieAway SOAway OTAway
Week of 3/2100.0*Average seed
National vs Loonies+0.5+0.5+0.5+0.5-0.2-0.2-0.2
Bizoune vs Mile-Enders+0.1+0.1+0.1+0.1-0.2-0.2-0.2

What If

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

100100100100100100100100100100
If finish:Chance inBooseChance will finish regular season at seed
TPW-L-Tplayoffsd'Or12345678910Count
121-0-0OutNo772322,003,430
110-0-1OutNo75251,514,955
100-1-0OutNo10052,349,035
Total:OutNo247675,867,420
Games Above .500
Chance Will Make Playoffs