How are these numbers calculated?

Big Games

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

Week of 7/21100.0*Bye To Finals100.0*Average seed
Dunedin 1 Skycity 5 -10.0
-0.1
Skycity 13 Canterbury 4 -3.8
-0.0
Botany 5 Dunedin 6 +0.2
Botany 2 Dunedin 8 +0.1
Week of 7/28100.0*Bye To Finals100.0*Average seed
West Auckland 6 Botany 3 +10.7
+0.1
West Auckland 6 Botany 0 +10.6
+0.1
Dunedin 4 Skycity 5 -9.4
-0.1
Week of 8/4100.0*Bye To Finals100.0*Average seed
Botany 0 Skycity 8 -19.1
-0.2
Botany 0 Skycity 7 -15.2
-0.2
Canterbury 4 West Auckland 5 +5.3
+0.1
Canterbury 1 West Auckland 6 +3.8
+0.0
Points
Chance Will Make Playoffs