oscommerce function

we need the following done in our oscommerce webshop we got discount based on category installed on the server. and output for productinfo we want change from: [login to view URL] is example product Price: €21,24 under cart it shows : Koop 11 kliklijst aluminium ronde hoek ... en ontvang 20% per artikel Koop 26 kliklijst aluminium ronde hoek ... en ontvang 23% per artikel Koop 76 kliklijst aluminium ronde hoek ... en ontvang 29% per artikel This must be dynamically changed to: • € 16,99vanaf 11 stuks 20% korting • € 16,35vanaf 26 stuks 23% korting • € 15,08 vanaf 76 stuks 29% korting here some extra text You see is the prices discounted with the discount from cart price