round price after discount

[Alexikakos]

hi all

I am using virtuemart 2.0.26d, joomla 2.5.17.

I wonder how to round product price AFTER discount.

I already have two digits after decimal point.(set from Configuration>Pricing)
But i wont to round price in last digit.

example:
http://www.matoufrance.com/index.php/el/baptism-gr-3/4602532-15-015301d-el-%CF%80%CE%B1%CE%B9%CE%B4%CE%B9%CE%BA%CE%AC_%CF%81%CE%BF%CF%8D%CF%87%CE%B1

main price: 32,90 €
price after discount: 29,61 €

how can i have, price after discount: 29,60 €

thnx.