I broke my ankle and I am wondering how much it will cost for a cast?

Cost will vary. It will depend on the type of cast and materials used. The cast itself will probably cost around $150-250. Usually there will also be costs for the doctor's visit and for x-ray. See your foot and ankle specialist for an evaluation. Delayed or inadequate treatment can lead to more problems in the future. Dr l.
Depends. Unfortunately you are not just talking about the cast. There needs to be an exam, x-rays and then casting. Ballpark would be $500.