How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Sunday100.0*Average seed
Dunedin 6 Southern 8 +0.2
Canterbury 4 Botany 5 (ot)+0.1
Saturday100.0*Average seed
Botany 2 West Auckland 5 -0.4
Canterbury 17 Dunedin 5 +0.1
Sunday100.0*Average seed
Botany 2 West Auckland 3 (ot)+0.3
Canterbury 3 Dunedin 5 -0.1
Points
Chance Will Make Playoffs