where does this value is storing, is it in sku's list price or any other property.
what is the format your using while saving the price value in sku.
does it like this -104.60 ?
if it's mandatory having the price value(-104.60) in sku's price property.
It has 3 ways to show the value(104.60) in jsp ,
1. writing a own tag converter
2. writing a new droplet, which removes the sign.
3. while saving the price in sku we can have a property descriptor to remove the extra sign out of price and save the desired value(-104.60) in sku.