The county treasurer shall on the fifteenth day of each month report to the chief executive officer of each school district an itemized statement of the amount of receipts and disbursements, by school districts, made by him for the previous calendar month and the balance remaining in his hands to the credit of each school district from each fund. His books must at all times be open to public inspection at all reasonable hours. Any county treasurer failing or refusing to comply with these provisions is guilty of a misdemeanor and, upon conviction, must be punished by a fine of not less than five hundred dollars, to be used for general school purposes in the county.