In the event more than one hearing is necessary on any application, as promptly as may be possible following the initial hearing, the Zoning Hearing Board shall determine the total amount of all costs incurred, and shall deduct same from the application fee. In the event the application is, at any time, insufficient to cover the costs incurred or reasonably anticipated to be incurred, the Zoning Hearing Board shall notify the applicant, provide the applicant with a written copy of each item, and shall require the applicant to pay, within 10 days of such notification, any balance then due; together with a further minimum deposit of one-half of the initial filing fee. In the event of multiple hearings, all costs shall be reported and collected in accordance with this procedure.