If replace alternator,also replace the Idler pulley, belt,& belt tensioner? $? on 2002 Ford Mustang

Battery new. If I need to replace all these, at what expect cost range?

Asked by for the 2002 Ford Mustang
2 answers
between 550.00 and 650.0 depending on parts brand
If you have to replace alternator I would check the pulleys if they seem to be ok then just replace the alternator