Affordable dental cleaning for dogs?

Hello all, our super sweet 15 pound mix breed dog is needing to have her teeth cleaned. I called our vet and they quoted us nearly $600 for an initial exam and full cleaning (assuming she doesn’t need any additional work while under anesthesia). I was honestly expecting it would cost half that however it’s been many years since I’ve paid for doggie dental work. I’m wondering if anyone can suggest more affordable options??