Add markup to base price based on item options.

I have a group of items that have additional services (i.e. personalize an item) that can be added when an item from that group is purchased. I want to be able to mark up the base price of these personalized items by a fixed amount if that option is chosen without having to manually enter it each time or getting thrown off when the base price changes. I feel like this would be similar to the line discount but I'm not sure of the best way to implement it. Any suggestions?

Thanks,

J.

AX Developer