The City Manager shall receive such compensation and expense allowances as the City Council shall from time to time determine and fix by resolution, and said compensation and expenses shall be a proper charge against such funds of the City as the City Council shall designate. Said City Manager shall be reimbursed for all sums necessarily incurred or paid by him in the performance of his duties or incurred when traveling on business pertaining to the City under direction of the City Council; reimbursement shall only be made, however, when a verified itemized claim, setting forth the sums expended for such business for which reimbursement is requested, has been presented to the City Council for approval.