I am struggling to get a solution where the sell_price change dynamically after I select the options from the attributes. I think I can modify the the uc_aac module and get the functionality done but so far no luck.
Changing $time->sell_price or $product->sell_price when rendering the form seems to affect the value. Maybe I am on the wrong track. I think the product module sets the values to default somewhere when rendering the product view form.