It shall be the duty of the administrator of the shelter care home and the staff of the detention home to receive all children who are committed to the homes by the court, until further order of the court, and to keep a complete record of all children residing therein, which record shall contain the name, residence, address, and age of each child, and the cause or reason for shelter care or detention, the length of time sheltered or detained, the offense alleged to have been committed by such child, if any, and other useful data or information that may be directed to be kept by the county board. A record shall also be kept by such administrator of all expenditures made by the county for the care and maintenance of such home. An annual report to the county board shall be made by December 1st in each year by the administrator who shall file a copy thereof with the county clerk of the county. It shall contain an itemized statement of all such expenses necessary to maintain such home, together with the number of residents therein during each month. The county board may at any time, demand, in which case it shall be the duty of the administrator to furnish, such information as the county board may require concerning the conduct, maintenance or residents of the home.