Have you noticed how the price on the Product Information screen shows the price of the base product and hidden away on the attribute drop down is how much the customer needs to add on.
If there are several attributes they need to be a mathematician.
With this fix, the price changes when additional attributes are selected.
The Base attribute has to have a zero attribute price for this fix to work.
Feel free to change the attribute on this page to see how it works.
Available Options:
Test Attribute: