All fees earned by the sheriff of the City of St. Louis, during any calendar month, shall be paid into the treasury of the city of St. Louis on or before the tenth day of the next succeeding calendar month. He shall keep a complete itemized account of all such fees, and of all expenses incurred by him in the discharge of the duties of his office. He shall file with the comptroller of said city on the last day of March, June, September and December of each year, or as soon thereafter as possible, in such form as the comptroller may direct, itemized statements of all said fees, commissions and emoluments collected by him, and also an itemized statement of all taxed and unpaid fees due and payable to the sheriff at the close of each of the above mentioned quarterly periods, together with an itemized statement of all expenses incurred by him. All of his books of record and of accounts shall be open to inspection by the comptroller at all reasonable times, and they shall be examined and audited by the comptroller at least once a month.