Not sure you are getting ripped off but you can get most of that done a lot cheaper.
Motor mount – An independent mechanic can replace this mount for cheaper. To give yourself an idea of cost, do an online search for “2006 Quest motor mount” part. I can’t see it taking more than 2 hours.
Belts – again an independent mechanic can replace the alternator belt. you may as well check the alternator while you are at it.
Battery – I don’t understand this especially if it is new. maybe a problem with the alternator? possibly something draining the batery?
rear wiper blade – I ordered a wiper blade from Advance Auto part for $13 and replaced it myself. I don’t understand the high cost.
find a good independent mechanic to do the work.