In addition to the penalty imposed by section 7203 (relating to willful failure to file return, supply information, or pay tax) any person required to supply information or to file a return under section 6011(c) who fails to supply such information or file such return at the time prescribed by the Secretary, or who files a return which does not show the information required, shall pay a penalty of $100 for each failure to supply information (but the total amount imposed on the delinquent person for all such failures during any calendar year shall not exceed $25,000) or a penalty of $1,000 for each failure to file a return, unless it is shown that such failure is due to reasonable cause.