How are these numbers calculated?

Big Games

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

Week of 10/1100.0*Average seed
Tasman 25 Canterbury 41 -0.7
Manawatu 10 Taranaki 44 -0.1
If winner is:HomeDrawAway
Auckland vs Northland-0.3+0.2+0.2
If winner is:HomeDrawAway
Week of 10/8100.0*Average seed
Taranaki vs Tasman-0.7-0.4+0.8
Counties Manukau vs Auckland+0.2+0.2-0.3

What If

Chances based on how well the Tasman finish out the regular season.   Explain

100100100100100100100
If finish:Chance inChance will finish regular season at seedRelegated to
TPW-OTLDplayoffs1234567ChampionshipCount
281-000In7624No7,600,176
260-001In6238No221,285
240-010In2674No7,605,287
Total:In372637No15,426,748
Points
Chance Will Make Playoffs