How are these numbers calculated?

Big Games

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

Week of 4/13100.0*Average seed
St.Margaretsbry 1 Ampthill Town 4 +0.3
Ampthill Town 3 Leverstock Grn 0 +0.2
London Colney 4 Hadley 2 -0.1
Biggleswade Utd 1 Hanwell Town 2 -0.0
Stotfold 2 St.Margaretsbry 3 -0.0
Dunstable Town 1 AFC Dunstable 0 +0.0
Week of 4/20100.0*Average seed
Ampthill Town 3 Oxhey Jets 2 +0.3
Oxhey Jets 3 Hanwell Town 1 +0.2
Ampthill Town 3 Hertford Town 1 +0.2
Hanwell Town 0 Harefield Utd 1 +0.1
Aylesbury Utd 3 London Colney 1 +0.1
Week of 4/27100.0*Average seed
Stotfold 5 Hanwell Town 1 +0.3
Tring Athletic 0 Ampthill Town 2 +0.3
Points
Chance Will Make Playoffs