OMG I'm about to be that person, but I actually pay myself 50$ an hour for labor. My overhead rate is much less of course. I have profit built into my items. The amount of profit varies per type of item and my items are a little bit lower than the price I'd like them to be. Since I give 50% to charity, I have to be able to profit at the wholesale level, so the equation is a huge starting point for me. I think I need to charge 15$ an hour to live according to Freelance Switch's Hourly Rate Calculator:
http://freelanceswitch.com/rates/But I have goals that I want to meet sooner than later, like owning an office space. And if my income isn't right, I can't do that.
Yes, the equation is not one size fits all, but at least you get a good picture of where you might need to fall. And if the price is way too high, that could be an indicator that your process isn't refined as much as it should be---or that your supplies are SUPER expensive.
PS: no person can live on minimum wage in America. so if you want your craft to eventually be your full time job, keep that in mind.