How are these numbers calculated?

Big Games

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

Week of 5/28100.0*Chance in playoffs100.0*World Cup Qualifying100.0*Average seed
Vanuatu 0 Solomon Islands 1 +29.0
+16.5
+1.3
Vanuatu 0 New Zealand 5 +0.5
+0.2
-0.0
Papua New Guinea 1 New Caledonia 1 +0.2
+0.2
Tahiti 4 Samoa 0 -0.1
-0.1
-0.0
New Zealand 3 Fiji 1 -0.1
+0.1
If winner is:HomeTieAway
Solomon Islands vs FijiIn-18.7-57.7
YesYes-5.1
+0.5-0.7-2.0
New Caledonia vs Samoa-1.3+2.4+1.7
+0.1+0.4-0.5
-0.1+0.2+0.1
Papua New Guinea vs Tahiti-0.8-0.5+0.9
-0.1-0.0+0.1
-0.1+0.2-0.0
If winner is:HomeTieAway
Week of 6/4100.0*Chance in playoffs100.0*World Cup Qualifying100.0*Average seed
New Zealand vs Solomon Islands-7.2+5.8+13.7
-0.5YesYes
-0.7+0.1+1.5
Fiji vs Vanuatu-1.9+3.0+4.0
+0.5+0.5-2.0
-0.0+0.1+0.1
Papua New Guinea vs Samoa-0.6+2.0+1.3
+0.0+0.3-0.7
-0.1+0.2+0.1
Tahiti vs New Caledonia+0.4-0.5-0.6
+0.2+0.1-0.6
-0.0+0.2-0.0

What If

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

100100100100100100100100
If finish:Chance inWorld CupChance will finish regular season at seed
TPW-OTLTplayoffsQualifying12345678Count
92-000InYes821810,177,586
71-001InYes193941110,194,609
61-01099.5%Yes0116821127,304,432
50-00299.3Yes1504811,916,921
40-01141.0Yes073441187,720,378
30-0202.190.3%022563904,403,082
Total:85.4%99.3%17143915771061,717,008
Points
Chance Will Make Playoffs