Every franchise granted shall provide that, and the council shall have authority to examine the books, vouchers and records of any person, firm or corpora-tion exercising or enjoying any franchise or privilege granted by the city, and it shall be the duty of every person, firm, or corporation exercising any franchise granted by the city, to file with the city clerk annually as provided by said franchise a report of its business during the preceding year: such report shall contain a statement of the gross receipts arising from the business done by such person, firm or corpora-tion, within said city, and such report shall contain such further facts as may be required by the council concerning the character and amount of business done, the amount and source of receipts and expenses connected therewith, during the period to be covered.