Here's a Race I handicapped.
The 1st lot of Odds are my assessment , and the 2nd set are what is available.

1 DEMOUCHI $110 $11
2 ROCKADORE $18 $21
3 SISCO SPICE $4.60 $7.50
4 WOT PRICE PINK $2.50 $2.00
10 LAST ONE IN $166 $26
6 PIPER PALMER $25 $5.50
7 MAJOR MONOGRAM $12 $9
8 MAGIC PENSKI $5.20 $5.50

3 animals are Overlays and are the only animals suitable to wager.
They are 2,3 and 8

Does anyone know a Formula that would work out how much I should invest on these 3 animals.

I don't want a Dutch Book - I know how to do that
What I want is something that will take advantage of the Bigger Overlays.