The 'formula' for the Quinella is identical to that used for win, place, exacta etc etc saving the deduction differentials.

The gross pool less 15% (or is it now even more - 20% WA TAB) divided by total number winning units = final dividend.

The deduction component has been described by some as "corporate greed". Others say the rising cost of a bet lies squarely at the feet of the lazy, apathetic and ignorant punting public.