Right on the money KV!

Comb.	Prob.	Q Price
1-2	0.325	$3.08
1-3	0.417	$2.40
1-4	0.076	$13.10
2-3	0.129	$7.74
2-4	0.023	$43.43
3-4	0.030	$33.53

Using the formula quinella probability equals :

1/(X(Y+1))+1/(Y(X+1))

where X and Y are the odds of the runners concerned. (i.e. decimal 'odds' -1)

Wunfluova

(formula courtesy of Roger Dedman in Commonsense Punting)