The appeal shall be considered and a decision rendered by the Council within 14 days of the filing of the written notice of appeal. The time for considering the appeal may be extended for good cause. The appeal process shall consist of a review by the Council of the transcript of the tape-recorded record of the earlier administrative hearing. No additional evidence may be presented as a part of the appeal. The sole issue before the Council shall be whether the decision of the City Administrator was supported by sufficient evidence. The decision of the Council is final.