Hi lenamegan,
jwws is right on the $. For two beds and a bath it could be as little as $50k or $60k. But an average basement remodel is usually in the $80-$100k range. Things to think about (and the reason why the price range is so wide): Do you have legal egress out of the bedrooms? (might need to saw cut the foundation) Are the walls framed out for insulation, or will that that be a cost? Are you replacing existing galvanized piping that runs to your upstairs plumbing fixtures since the area is open? Relocating furnace? Replacing knob and tube wiring? Are you doing a full bath with cabinetry and counters or thinking a simple pedestal sink?
Most general contractors will be able to provide ballpark pricing to help you understand the costs of your specific project.
Good luck with the project!
–Anne