How are these numbers calculated?

Big Games

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

Week of 4/26100.0*Promoted100.0*Average seed
Brentford 0 Hereford 3 +9.8
+0.2
Barnet 2 Stockport 1 +6.0
+0.1
Chester 0 Stockport 0 +4.6
+0.1
Bury 1 Rochdale 1 +1.5
+0.0
Grimsby 1 Peterborough 4 +0.1
Week of 5/3None
Points
Chance Will Win Championship