Dog's baby teeth will not come out, help.?

We bought a little Yorkie a year ago, she has her permanent teeth in but also still has the incisor baby teeth, poor little thing, she looks like a little alligator, we have tried to see if they are even loose with a piece of dental floss, they are not. Does anyone know approximately how much to have the vet remove these. Am afraid to even guess. She weighs about four or five pounds. Thanks much.