Within 45 days after the close of each month in a calendar year, any public service provider charged hereunder shall file with the City Treasurer of the City a report of its gross revenue derived from sales, use, or both sales and use of the service during the month in the City as defined herein, together with a computation of the local charge. Coincidental with the filing of such report, the public service provider shall pay to the City Treasurer the amount of the local charge.