possible core repair, what's the estimate? on 1999 Ford F-250 Super Duty

radiator fluid leaking inside passenger side, started today. we were told it's the core. is that correct? what would that cost to repair?

Asked by for the 1999 Ford F-250 Super Duty
yes thats the heater core leaking.about $200 or less to repair.
Thank u, this honestly put a damper on our christmas cheer this morning. :)