Hello.
In Magento the price of simple products is being ignored when they are part of configurable.
If you want the price to be changed depending on variation selected from drop-down, you have to add mark-ups or mark-downs (percent or fixed value) to general general configurable product price in 'Super product attribute configuration' -
Here is also the article with video for the details -
http://blog.mag-manager.com/2013/07/how-to-make-price-of-magento.html