Such applicants shall also, at the time of filing such application provided for in the preceding section, pay to the city clerk-treasurer for the benefit of the city, as an annual license for each taxicab covered by said application, a nonproratable sum as follows:

    A.    Two hundred dollars for up to four such vehicles to be operated;

    B.    Twenty-five dollars for each additional vehicle to be operated by such applicant. (Prior code § 29-15)