Vets, Drs, dentist, etc. are more or less mechanics. Go in for an oil change and leave spending $350. That vet would have loved to play on your emotions while draining your bank acct.
I think he mentioned earlier that the vet more or less said the chemo was not a good quality of life option
For what its worth, my neighbor friends gave their dog chemo, and it didn't make their dog sick. But, like your doc is telling you, it only extended the dog's life so much. Such a bummer man, sorry about the news.
I hear you man, it's never easy dealing with the death, or the inevitable end for a pet, especially a dog.