public static int GetReplenishmentSuggestion(int pzn)
 {
     using (PharmacyContainer db = new PharmacyContainer())
     {
         Drug  drug            = GetDrug(pzn, db);
         Int32 quantityPending = GetQuantityPending(drug, db);
         return(drug.ReplenishmentSuggestion(quantityPending));
     }
 }