The respective salaries and compensation of officers fixed by this charter, or by ordinance or resolution of the Council, shall be in full for all official services as such officers for the City or public, and shall be in lieu of all fees, commissions and other compensation receivable by such officers for their services in performance of the duties of their offices; which fees, commissions and compensation shall belong to the City, and be collected and accounted for by such officers, and be paid to the city treasury, and a statement thereof filed with the City Clerk as often as once in each week.