What is the typical cost to spay or neuter a dog?

I live in Central NJ and took my 9 month old Golden to our regular vet, not a clinic. The presurgical bloodwork to make sure Barney was good and healthy for surgery was about $85 and was done a week before the surgery. Normal neutering at the vet is about $250, but unfortunately, Barney had a retained testicle and they had to go into his abdomen to find the missing one. This resulted in a long incision in his belly, about 5-6 inches. The neutering fee for this complicated situation was about $390. I love my vet and felt the higher fee was justified as opposed to going to a neuter/spay clinic that would have done the surgery for a fraction of that cost. My vet's office also bathed Barney, post-surgery, and gave him lots of love and attention. They didn't keep him overnight either so he was able to recuperate at home. They sent him home with pain meds for 1 week and antibiotics for 2 weeks and he'll have his stitches removed after 2 weeks. Hope this helps!