Specific Price For Specific Combination

[pette]

Hi,

I want so dell 1 product.

this product has 3 combination with 3 different price and 3 different quantity.

now I want to add an other option for each combination but this option has a different price for each combination and the quantity doesn't change .

So if I select the product, it has a combination , it has a quantity but if I select an other option it has to change only the price but not the quantity.

I cannot generate 6 combination with 6 different quantity, but only the principal 3 combination....

how can I ?

thanks