hey, welcoem back!
I think this is a really localized question.....it's cheaper in the midwest than on the coasts, of course.
However, there are also variables between offices and frankly I encourage people to ask around. Some places (maybe VCA, for example) insist on getting a full panel of bloodwork, I'm told. That's an extra expense in my opinion for a dog under 3. But that's just me. So I recommend calling around, asking your breeder or even asking others at doodle romps, and dog parks.
Also - with males, some vets do a laser surgery on them, and some do a more conventional method and you might like to ask a couple vets about the differences, and pro's/con's, in cost or otherwise.
I paid $65 to have Nicky neutered at the local Humane Society Spay and Neuter Clinic. That included having him microchiped. The vet would have charged $230 for neutering plus microchip. That was too much for my budget!