How are these numbers calculated?

Big Games

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

Week of 4/20100.0*Average seed
FC United 3 Ashton United 0 -0.4
Chorley 1 Ashton United 1 -0.1
Marine 1 North Ferriby 3 +0.1
FC United 1 Worksop Town 0 +0.1
Whitby Town 1 Eastwood Town 1 +0.1
Ilkeston FC 0 Hednesford Town 2 +0.1
Week of 4/27100.0*Average seed
Grantham Town 1 Marine 0 +0.2
Ashton United 2 Whitby Town 2 -0.1
Matlock Town 1 Worksop Town 5 -0.1
Matlock Town 1 Ilkeston FC 1 +0.1
Week of 5/4100.0*Average seed
Ilkeston FC 1 Marine 0 +0.4
North Ferriby 2 Ashton United 0 -0.2
Points
Chance Will Win Championship