The article provides links to support pages explaining how to find Pools and Probables, why some Minimum Probable Payoffs are based on $1 or $2 base wagers, and how wagering dollars are distributed.
How do I find Pools and probables?
Why are some Minimum Probable Payoffs based on a $1 base wager amount and others based on a $2 base wager amount?
How is my wagering dollar distributed?