Generally, the cost of surgery is about 9000 to 1 1000 for Grade III B and about 20000 to Grade III A 13000. The specific cost depends on the items of surgery, such as sinus surgery and partial turbinectomy. And the choice of surgical anesthesia is very different from local anesthesia. It is generally recommended to choose local anesthesia. If the doctor has been recommending general anesthesia to you, you should weigh it yourself.
I wish you a good recovery, but you can ask.