How much is 401k setup fee?

Excuse me, could you please clarify the cost associated with setting up a 401k plan? Specifically, I'm interested in understanding the average setup fee for establishing such a retirement savings account. Is there a standard fee that's commonly charged, or does it vary depending on the provider and the specific details of the plan? I'm trying to budget for this expense and want to ensure I have an accurate understanding of the financial commitment involved.