What will my paycheck be post-taxes?

I live in Knox County in Tennessee and I'm applying for a job. I'm a woman (Excuse the male thing, I'm on my friend's account since I have no yahoo), I am single, and I have no dependents. The job will pay approximately $40/day and it will exempt me from civil service status even though it's considered a job for the city. That's all I really know about the job itself since I only have the application as reference.

about 85% of your gross