Also factor where you're getting your material. If you're buying it from the big box stores it's kind of hard to mark something up 25% that the customer can go buy themselfs cheaper. I'm not saying that you shouldn't charge for your time and expense of going and getting the material, which is really all that you are doing.
I can build anything you want if you draw a picture of it on the back of a big enough check.
There's no substitute for hard work....but that doesn't mean I'm going to give up trying to find one.
IAEI / CEI / C10
Certified Electrical Inspector