After the Board of Review has completed its review of theassessment roll, the Assessor shall prepare a copy of the assessment roll, to be known as the "City Tax Roll." Upon receiving the certification of the several amounts to be raised, or to be assessed, reassessed, or charged, as provided in Section 9.11 of this Charter, the Assessor shall spread upon said tax roll the several amounts determined by the Council to be raised, charged, assessed, or reassessed against persons and property. He shall also spread the amount to be raised by general city tax, according to and in proportion to the several valuations set forth in said roll. To avoid fractions in computation on any tax roll, the Assessor may add to the amount of the several taxes to be raised thereon not more than the amount prescribed by statute. Any excess created thereby on any tax roll, for the levy and collection of taxes in the City, shall belong to the City.