This is an unfair question for so many reasons. Mostly because no one can give you a correct answer to many varibles. So here are a couple questions for you.
1) go on craigslist and get an idea what people are charging in your area you will find regulars and lowballers beware the low baller
2) what type of truck, trailer, and equipment are you running and planning on running?
3) are you licenced and paying your taxes?
4) what is your time worth to you? What would you like to make?
5) what's your plans for marketing?