If you got lower salary than the prevailing wage from this firm, say your salary is 50K, prevailing wage for your position is 60K. Then the profit (starting from the day you filed LC) should be bigger than 10K.
Otherwise, in most chances, you'll be required to provide asset audit from CPA. The net assets of the firm should be bigger than 10K. However, if you need to get to this step, you have high chances to get denial.