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 -15.5
-0.2
Skycity 13 Canterbury 4 -13.9
-0.1
Botany 5 Dunedin 6 +1.4
Botany 2 Dunedin 8 +0.4
Week of 7/28100.0*Bye To Finals100.0*Average seed
West Auckland 6 Botany 0 +15.4
+0.2
Dunedin 4 Skycity 5 -14.3
-0.1
West Auckland 6 Botany 3 +14.2
+0.2
Week of 8/4100.0*Bye To Finals100.0*Average seed
Botany 0 Skycity 8 -31.8
-0.3
Canterbury 1 West Auckland 6 +26.3
+0.3
Botany 0 Skycity 7 -22.5
-0.2
Canterbury 4 West Auckland 5 +20.4
+0.2
Points
Chance Will Make Playoffs