Two questions regarding price/attribute influencing one another

Dear Zenners,

1. I'm wondering how I can show the cumulative sum of the attributes and have that price being flexible when people pick a different attribute. A screenshot:
   http://img90.imageshack.us/img90/4621/20076921rd6.jpg

I'd like to see that if a different attribute is picked there's a price that actually changes, so the customer doesn't have to do the math him/herself.

2. I'm also wondering if it's possible to have the productprice (without people changing attributes, they're just navigating through the products) show up incl. the basic (priority: 0) attributes. So let's say the minimum price for a product with it's priority 0 attributes is 324.13 and people can change the attributes later to make the price increase/drop. But is it possible to show a minimum price in the navigation instead of having to pick a fixed price (like 340), because the problem with that is that if people select an attribute the price is added..

Or do I have to: Set a minimum price (lowest options) and make all other options increase the price by (price: new option - old option = attribute price)

Thanks in advance,

You would need to write the code, most likely in java of some sort, to update the total as attributes are selected ...

There is also the choice of Priced by Attribute where the Product is set to 0.00 for a price and the Attributes are set with the total charge without the prefix ...