Michaelg,
Have you considered the Don Scott "Price asessment" as a filter with this.
i.e
Sunshine Coast
Race 6 H 2 (asessed @.2.70
Race 7 H 3 $3.10
Murwillumbah
R 5 H 8 $3.00
Kalgoorlie
R 3 H 1 $2.45
R 4 H 6 $2.10
R 6 H 9 $1.50

CoonambleR 5 H 1 $2.75
Cranbourne
R 8 H 13 $4.20
Warnambool
R 1 H 1 $1.16 (steeple race)

Cheers
darky