How are these numbers calculated?

Lottery

We are out of the playoffs. Here are the big games and what ifs for draft seeds.
Although it might be more fun to go down swinging.

Big Games

Week of 9/25100.0*Lottery seed
Italy 23 Canada 18 -2.3
South Africa 46 Samoa 6 +0.2
Argentina 54 Georgia 9 +0.1
Ireland 44 Romania 10 +0.1
Scotland 39 United States 16 -0.0
Tonga 35 Namibia 21 +0.0
Week of 10/2100.0*Lottery seed
South Africa 34 Scotland 16 +0.1
Namibia 16 Georgia 17 +0.1
New Zealand 43 Georgia 10 -0.1
Canada 15 Romania 17 +0.1
Samoa 5 Japan 26 -0.0
England 13 Australia 33 -0.0
South Africa 64 United States 0 -0.0
Week of 10/9100.0*Lottery seed
Samoa 33 Scotland 36 -0.2
England 60 Uruguay 3 +0.1
New Zealand 47 Tonga 9 -0.0
If winner is:HomeTieAway
Italy vs Romania-2.3-1.3+2.7
United States vs Japan-0.4+0.0+0.0
Argentina vs Namibia-0.0-0.0+0.2

What If

100100100100100100100100100100100100100100100100100100100100
If finish:Chance will finish season at seed
TPW-OTLT1234567891011121314151617181920
81-000595
60-001100
40-0100973
Total:241140421
Points
Chance Will Make Playoffs