How much does it usually cost at a salon to take out black hair dye from your hair?

i dyed my hair black about 4 months ago and its still black! i tried dying it burgandy but it only dyed the roots and it looks a little weird. So i was thinking of going blonde but seeing as the burgandy didnt work i want to take out all of the black color and i was wondering how much it would cost?How much does it usually cost at a salon to take out black hair dye from your hair?
Im not sure how much it would cost, try goin to a beauty store and check to see if they have color remover!! i was in the same dilemma so i got color remover n it worked!!!