SP stands for starting price.
How can friday's paper have starting prices?
They are only pre-race odds from Thursday arvo.

Open an account with IAS - they guarantee to beat any win dividend on TAB, SuperTAB and UniTAB for saturday metro meetings. Their place divs are also better than the largest TAB - NSW.

Lets say you make 1000 bets pa.

Avg div variables
10c more = $100
20c more = $200
50c more = $500
$1 more = $1000

makes a big difference, if you get the best div available.