The TAB works on a tote system. ALL wagers are gathered then their (TAB 15%) margin is deducted and the remainder is divided between the punters that were lucky enough to back the winner. ALL prices on the board are only indications of what the payout would be if the betting stopped immediately. It is not until all late bets are in and the computor has tabulated everything that the final prize pool and subsquently the payout is known. Up till then you are punting on an unknown factor.

Regards Beton