Price Factor: Based on other attributes?

[01011010]

Hi,

I need a price factor that is based on another attribute, rather than the product's base price.

Example:

Select Material
Cheap ($100)
Average ($200)
Expensive ($300)

Select Size
Small (factor above by -0.25)
Medium (factor above by 0.00)
Large (factor above by +0.25)


This should generate the following price totals:

. . . . . . . . . . . Small . Medium . Large
Cheap . . . . . . $75 . . . $100 . . $125
Average . . . . $150 . . $200 . . $250
Expensive . . . $225 . . $300 . . $375

Is there any way to do this? I really need the Size option to be based on the Material option, rather than the base price. Here is the site (fake products and images up as of Nov/19) that would benefit from this pricing method: http://www.goldtonew.com/index.php?m...&products_id=2

Thanks,
01011010