Multiply price impact on combinations

[Major Bob]

I hope somebody can help with this issue I've been having.

 

The products in my shop are custom made and have lots of different combinations. They can be 1cm or 3m in size. Changing the attribute of a big product is obviously much more expensive than a small product.

 

I would like to have a simple price impact such as 10% increase in price if an attribute is selected. This keeps the price increase relevant to the size of the product.

 

Is there any way to change the coding to multiply instead of add in the price impact?

 

Thanks in advance

[Major Bob]

I think that this should be simple in the coding. I imagine that an addition operator is used which can simply be swapped for a multiplication operator somewhere in the code. Does anybody know if this is correct or have another idea?

[Major Bob]

Can anyone point me in the right direction? I'm at a complete standstill without a solution to this problem.