The four Councilmembers shall receive, as compensation for their services, a salary equal to 40% of the salary of the Mayor. They shall also be entitled to receive reimbursement for Council-authorized and budgeted travel and other expenses when on official duty of the City consistent with City policies. The City Council may also provide, by resolution, for the payment to Councilmembers of an allowance of a sum certain per month to reimburse them for the additional demands and expenses made upon and incurred by them in serving as Councilmembers.