Hallo!
I've got soma strange problem
I have a product with Retail price 4.300000 I have a VAT 21% My final Retail price is 5.20€ with VAT
When a add one pcs. to card, the cart sum is 5.20€
BUT... when i add 2 pcs. to card, the strange part starts here, because then, the cart summ is 10.41€ Why? Where to dig? :/