Specials Price problem

I have an item that is $199. It's $8 more to change the type of wood it is made out of.

I set a sale price of 20% off. So it shows up as starting at $159.20. However, if I change the type of wood to the one that should be $8 extra, the price becomes $207, which is the original price plus $8, not the sale price plus $8.

This site is in development and this is simply a test item, so if you want to play with it, that is fine, I can remove orders, etc.

https://www.koimillworks.com

Thanks.

Ok, just noticed that the extra price should be $10, so $8 is 20% off the add ons, but still adds to original item price....

Oh, geez, never mind, I had it set to price by attributes.
You'd think I'd know that by now.....

Thanks anyway!