How are these numbers calculated?

Big Games

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

Week of 4/23100.0*Average seed
Crawley 0 Carlisle 1 -0.1
Mansfield 1 Barnet 1 -0.1
Notts County 1 Cambridge 2 -0.1
Wimbledon 1 Leyton Orient 0 +0.0
Luton 1 Newport 1 +0.0
Bristol Rovers 3 Exeter 1 +0.0
Portsmouth 2 Wycombe 1 +0.0
Week of 4/30100.0*Average seed
Barnet 3 Yeovil 4 -0.5
Wycombe 0 Accrington 1 +0.1
Carlisle 0 Oxford Utd 2 +0.1
Exeter 1 Morecambe 1 +0.0
Northampton 2 Luton 0 +0.0
Week of 5/7None
Points
Chance Will Win Championship