public void Save(CuttingUnit cuttingUnit)
        {
            try
            {
                var xmlStr = Serialize();

                if (!String.IsNullOrEmpty(xmlStr))
                {
                    cuttingUnit.TallyHistory = xmlStr;
                    cuttingUnit.Save();
                }
            }
            catch (Exception e)
            {
                throw new TallyHistoryPersistanceException("Unable to save tally history", e);
            }
        }