How do I rate the bm races. Can someone help

I just consider them like this.

WFA
Group races
Open handicaps (Saturday and public holidays)
Open handicaps (Provincial - Sundays)
Welter (Saturdays and public holidays)
Flying (Provincial / Sunday)
Class**6 Saturday
Welter / mares handicap (provincial / Sunday)
Class**6 Provincial**
0 - 90 and better
Restricted Handicaps e.g. 1MW, 2MW etc
0 - 80 up to 0- 89
Class**5
0 - 75 up to 0 - 79
Class**4
3YO 1Metro win
0 - 72 up to 0-74
Class**3
0 - 63 up to 0-71
Class**2
3YO Open
0-55 up to 0 - 62
Class**1
3YO Restricted
2YO Quality**
Maiden City
2YO open
Maiden Provincial
Maiden Country

Races
Class A
Class B

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