need help on ammount formating with num{$z,zzz,zz9.99}

Hi All

,

Need help in formating the amount fields.

Currently I am using num{$z,zzz,zz9.99} Its working fine for positive ammount value.

But for negative amount its giving output as $-18,970.50

Expected out is -$18,970.50

need '-' sign before $

Thanks,

Abhijit