How are these numbers calculated?

Big Games

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

If winner is:HomeDrawAway
Week of 10/1100.0*Average seed
Southland vs Hawke’s Bay+0.4-0.1-0.1
Bay of Plenty vs Wellington-0.2-0.1+0.1
If winner is:HomeDrawAway
Week of 10/8100.0*Average seed
Wellington vs Manawatu+0.1-0.3-0.4
Hawke’s Bay vs Waikato-0.1-0.1+0.4

What If

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

100100100100100100100
If finish:Chance inChance will finish regular season at seedRelegated to
TPW-OTLDplayoffs1234567ChampionshipCount
302-000In2773No23,563,808
281-001In397No957,285
261-010In298No18,975,595
0-002In298No9,566
240-011In5347No345,597
220-020In793No2,428,393
Total:In15805No46,280,244
Points
Chance Will Make Playoffs