[TYPO3-shop] Different dicounts for different products ?

[Gunnar Jonsson]

I have created a webshop with tt_products, but some of the products have a 
discount like the following:
if the customer buys until 9 pieces, each piece costs 30 ?
if the customer buys until 49 pieces, each piece costs 25 ?
if the customer buys more than 49 pieces, each piece costs 20 ?

Some other products has the following discount rules:
if the customer buys until 9 pieces, each piece costs 2 ?
if the customer buys until 99 pieces, each piece costs 1,8 ?
if the customer buys until 199 pieces, each piece costs 1,7 ?
if the customer buys more than 199 pieces, each piece costs 1,5 ?

Could I do that with typoscript configuration or do I have to make a special 
calculation script in php ? Does anyone have an example how to connect such 
kind of discounts to specified products ? The discount is regardless who is 
buying.

regards,
Gunnar Jonsson