How are these numbers calculated?

Big Games

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

Week of 10/11100.0*Average seed
Serbia 5 Macedonia 1 +0.6
Wales 1 Macedonia 0 +0.4
Latvia 2 Slovakia 2 +0.2
Scotland 2 Croatia 0 -0.2
Denmark 6 Malta 0 -0.2
France 3 Finland 0 +0.2
Israel 1 Northern Ireland 1 +0.1
Iceland 2 Cyprus 0 -0.1
Slovenia 3 Norway 0 -0.1
Greece 1 Slovakia 0 +0.1
Denmark 2 Italy 2 +0.0
Bulgaria 0 Czech Republic 1 -0.0
Portugal 1 Israel 1 -0.0
Albania 1 Switzerland 2 +0.0
Points
Chance Will Make Playoffs