Turn signals and hazard warning lights don't work. Fuse OK. Cause? Cost of Repair?

most likely a turn signal switch, $318 + tax installed. come in today and we will get your vehicle all fixed up.

Did you check the flasher units http://partimages.genpt.com/largeimages/863808.jpg They should be located with the fuses and there is one for turn signals and a separate one for the emergency flashers, About $10 at the parts store