How are these numbers calculated?

Big Games

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

Week of 4/24100.0*Average seed
Accrington 1 Barnet 0 +1.0
Crewe 5 Accrington 1 -0.6
Hereford 2 Rochdale 1 -0.2
Burton 0 Bournemouth 2 +0.2
Torquay 1 Macclesfield 0 +0.1
Week of 5/8100.0*Average seed
Crewe 0 Bradford 1 -0.6
Cheltenham 1 Accrington 1 -0.2
Burton 3 Grimsby 0 -0.2
Port Vale 1 Shrewsbury 1 -0.1
Points
Chance Will Win Championship