No idea but would not be very cheap.
I guess it would depend when you bought your device if it might still have the one year warranty on it or did you possibly buy Samsung Care + insurance that would cut the price down to around $100
You should definitely stop using the phone if the battery is swelling! There's a REAL risk of fire / explosion, ESPECIALLY if the screen has cracked because of the pressure from the battery!!!
I DEFINITELY would NOT connect it to a charger!!!
I know of some people, who's phones have exploded & caught fire! They were lucky that their house didn't burn down!!
If you can't afford a new phone, then try to get one on Kijiji.. Because you probably can't afford to find a new place to live!
Hi, just to confirm, are you using the original Samsung charger?
If you are using the original charger and the issue still persists.
Then, we recommend you to get your device examined by the service technician by visiting Samsung authorized service center.
So that, they can determine the root cause of the issue and fix it.
At this point, the reason for the issue is somewhat academic.
The battery has swollen to the point where it has cracked the screen.
This device is UNSAFE to use, let alone charge!
A visit to a Samsung Service center, or any reputable repair shop is a "no brainer", but the device is almost certainly beyond repair at this point.