how much to exchange brake fluid and power steering fluids?

Depending on the quality of parts(fluid-OEM IS best) and quality/care of service performed (they are generally, simply high profit money makers , but not always) If it's done well , expect anywhere from $300.00-$400.00 for both. Most of the money is for time/labor , brake fluid should be about $25.00 (retail , w/shop mark-up) the OEM P/S fluid , I'm not sure of cost. Check on estimator with YOUR zip-code for the brake flush , I did not see anything on there for power steering , I would figure parts , plus a MAXIMUM of 1 hour labor (again , if it is done properly ,***KEY word***-PROPERLY , it may be worth it if the car is a 'keeper'.