How do you figure a price to paint interior of houses?

starting own bussiness need to know how to bid on a job without losing money on the mississippi gulf coastHow do you figure a price to paint interior of houses?
Offer a better service and it does not matter if people under price you or not!Just remember to tell them the benefit TO THEM for using your company.People only ever hear what is best for them, ie: I am sure you dont want to pay out again next year, do you? (Shake your head). You look like an intelligent lady obviously you appreciate a job done to a job done properly! Never think that your services are not worth a good price otherwise you lose out in the long run.Know Your Worth!How do you figure a price to paint interior of houses?
I would check around and see how much it would cost you.And Google can help tremendously also.