Estimate for replacing the DRive belt tensioner on Nisson Sentra 2004 on 2004 Nissan Sentra

Belt tensioner is not working correctly Belt squeals

Asked by for the 2004 Nissan Sentra
maybe a couple hundred in labor
Thanks for estimate, National Tire and Battery estimate of $400 - $500 with parts. Local independent auto repair shop charged me $135 labor $100 parts. Got to like the small honest guy.