It shall be the duty of the City Manager to purchase and he shall be responsible for the purchase of all supplies for the City and all supplies of all the departments and divisions of the City. All expenditures recommended to the City Council shall be submitted through the City Manager. (Ord. 80-3 § 1, 1980; Ord. 76-3 § 1, 1976; Ord. 83 NS § 7(i), 1955; prior code § 2-6(i).)