Change attribute prices globally

We add a field in your attribute management with which you can easily change the price mark-ups and mark-downs of your attributes.

Example:

You sell T-shirts.

You have the attribute "Size" with the values S, M, L, XL.
These sizes have different mark-ups or mark-downs depending on the T-shirt.

With this module you can now make such changes:
- increase the price for size S by 10%
Result ==> the attribute price mark-up/mark-down for S then changes, for example, for the red T-shirt from -5 to -4.50 euros
or for the yellow T-shirt from 10 euros to 11 euros.

- increase the price for size S by 2 Euro
Result ==> the discount for S changes from -5 to -3 Euro or from +7 to +9

- decrease the price for L by 2 Euro
Result ==> the discount for L changes from +2 to 0 Euro or from -5 to -7 Euro

- increase the price for XL by 10%
Result ==> the discount for XL does not change at all at 0 Euro and at +2 to +2,20 and at -20 to -18