I take my dogs to a place by my house. I only allow one woman there to groom them and I stay and watch the entire procedure -- I NEVER leave them alone there (I'm too suspicious) even though I love the woman who grooms them and I can clearly see that my pooches love her by all the kisses they give her.
They charge me $40 per dog. This price includes a bath, cut/trim, nails clipped, anal glands expressed, ear hair removed, bow or bandana, etc. It pretty much covers EVERYTHING except a hot oil treatment.
So if I take both my dogs on the same day, it costs me $80. Plus I give her a tip.