Wife wants to have her blazer tuned up, just because it has been 3 years since last one

She tells guy at Speedy to do it after doing oil change. I think, no big deal 60 or 70 bux for a V-6. We pick it up this afternoon; 15.95 for the oil change and $140 to replace 6 spark plugs

What a crock, these guys are criminals. How long can it take to change plugs......an hour tops I figure. I'll never go there again. I noticed a sign posting rates when we picked up the vehicle. $80 an hour/ flat rate or clock time. I'm so pissed it isn't funny