How do you get misdemeanors expunged off your record and how much would that cost ?

If you have convictions for certain types of misdemeanors, they can be expunged after 10 years of good behavior (meaning you have had no other misdemeanors or felonies during the 10-year period). However, you mention probation, so it sounds like you received an SIS (suspended imposition of sentence), which would mean that you never received a conviction. If you were arrested and you're trying to get the record of the arrest expunged, that is only possible in situations where the person was arrested based on false information and no subsequent charges were ever filed, which does not seem to fit your situation.

If 5 years has passed since the charge you can do this yourself by calling the Probation Department where the charges were brought. They should be able to provide you with a few forms to fill out and assist you in completing them. If it has not been five (5) years, then you need to appeal to the court where the charges were arraigned and disposed. The fee can vary depending on how many courts we are involved with and where those courts are located.