How much should a mechanic charge to replace a broken lug stud?

most of the time it is fairly easy to do on your own. but a mechanic should charge about 30 to 70 dollars. support the car on jack stands, remove the wheel, remove the brake parts that interfere with removing the rotor, remove the rotor, use a hammer to hit the broken stud thru the hub, insert the new stud thru the hub, using a spare lug nut ( one that can screw all the way on the stud thread on the stud, use a long bar wedged between two other studs to keep hub from rotating, tighten the lug nut until the stud seats, back off the lug nut, reinstall rotor, and brake components, add wheel and lug nuts ... done