How much $ to replace one lower balljoint?

I replaced both sides a couple years ago and did the work myself. It was not too hard, but w/ the temp around 20 tomorrow evening, I'm not too fired up about diving in. Anybody know how many hours a shop will charge to RR one side lower balljoint? Seems like I was quoted 150 or so labor only per side, but I can't remember.
Also, anybody know if Bumper to Bumper will warantee a balljoint that went bad in less than 20k miles? Thanks

 

Just for labor around here in california is between 110-140 depending on which shop you take it too and that's for both lower ball joints.