Article 223 of the Labor Code, which sets forth the rules on appeal from the Labor Arbiter's monetary award, provides: ART. 223. Appeal. --- Decisions, awards, or orders of the Labor Arbiter are final and executory unless appealed to the Commission by any or both parties within ten (10) calendar days from receipt of such decisions, awards, or orders. Such appeal may be entertained only on any off the following grounds: (a) If there is prima facie evidence of abuse of discretion on the part of the Labor Arbiter; (b) If the decision, order or award was secured through fraud or coercion, including graft and corruption; (c) If made purely on questions of law; and (d) If serious errors in the finding of facts are raised which would cause grave or irreparable damage or injury to the appellant. In case of a judgment involving a monetary award, an appeal by the employer may be perfected only upon the posting of a cash or surety bond issued by a reputable bonding ...