A filing fee equal to 35% of the total permit fee must be paid at the time of permit application filing. The filing fee is included in the total permit fee specified in this ordinance. The filing fee amount shall not be refunded if no permit is issued. In case of abandonment or withdrawal of any permit or application, sixty five (65%) percent of the fee shall be refunded to the applicant, provided that he makes a written request before the work is commenced. If work has commenced, the applicant may return the permit with a written request for cancellation and a prorate refund of the fee shall be made based on the remaining uncompleted work; provided further that such request is made within six (6) months after the date the permit is issued.