As usual with legal-related questions on Yahoo! Answers, far too little information exists to answer the question adequately.  Are you disabled?  And you're a student in Merced County, California?  Regardless, the information regarding your situation is far too abstract and ambiguous to provide a concrete answer.  I've included a link to BEST put out by the Social Security Administration.  BEST is the Benefit Eligibility Screening Tool, which does not compute the total sum of benefits you're eligible for, but simply determine which category of benefits are right for you, if you're eligible.  This should be the first step toward determining the total eligible.  The SSA would be able to provide more details for you in your specific situation, since amounts may vary wildly depending on personal facts and details.
what is the maximum amount of ssi benefits a 23 year old person can resieve if going to school in merced count