diff --git a/.~lock.LogAB(20).joined.csv# b/.~lock.LogAB(20).joined.csv#
new file mode 100644
index 0000000..38b71a4
--- /dev/null
+++ b/.~lock.LogAB(20).joined.csv#
@@ -0,0 +1 @@
+,DESKTOP-M40GG9U/Thad,DESKTOP-M40GG9U,09.10.2025 08:10,file:///C:/Users/Thad/AppData/Roaming/LibreOffice/4;
\ No newline at end of file
diff --git a/.~lock.LogAB(20).xls# b/.~lock.LogAB(20).xls#
new file mode 100644
index 0000000..ed05703
--- /dev/null
+++ b/.~lock.LogAB(20).xls#
@@ -0,0 +1 @@
+,DESKTOP-M40GG9U/Thad,DESKTOP-M40GG9U,09.10.2025 08:40,file:///C:/Users/Thad/AppData/Roaming/LibreOffice/4;
\ No newline at end of file
diff --git a/LogAB(20).xls b/LogAB(20).xls
new file mode 100644
index 0000000..73b24c3
Binary files /dev/null and b/LogAB(20).xls differ
diff --git a/LogAB(20).xlsx b/LogAB(20).xlsx
new file mode 100644
index 0000000..bc0743c
Binary files /dev/null and b/LogAB(20).xlsx differ
diff --git a/main.py b/main.py
index 10afe23..11a368f 100644
--- a/main.py
+++ b/main.py
@@ -5,6 +5,12 @@ from tkinter import filedialog, messagebox
 import subprocess
 import os
 from datetime import datetime
+import shutil
+try:
+    from openpyxl import load_workbook
+    XLSX_AVAILABLE = True
+except ImportError:
+    XLSX_AVAILABLE = False
 
 def parse_logs(log_text):
     lines = log_text.splitlines()
@@ -72,6 +78,42 @@ def write_csv2(pairs, filename):
             gross_weight, gross_units, gross_time = pairs[-1]
             writer.writerow([gross_weight, '', '', gross_time, '', gross_units, '', ''])
 
+def write_xlsx(pairs, output_filename, template_path='template.xlsx'):
+    """Write sequential data to XLSX file using template"""
+    if not XLSX_AVAILABLE:
+        raise ImportError("openpyxl is required for XLSX export. Install with: pip install openpyxl")
+    
+    if not os.path.exists(template_path):
+        raise FileNotFoundError(f"Template file not found: {template_path}")
+    
+    # Load the template workbook (data_only=False preserves formulas)
+    wb = load_workbook(template_path, data_only=False)
+    
+    # Check if SEQUENTIAL sheet exists
+    if 'SEQUENTIAL' not in wb.sheetnames:
+        raise ValueError("Template does not contain a 'SEQUENTIAL' sheet")
+    
+    # Get the SEQUENTIAL sheet
+    ws = wb['SEQUENTIAL']
+    
+    # Clear existing data (starting from row 2, assuming row 1 has headers)
+    # First, delete all rows below the header
+    if ws.max_row > 1:
+        ws.delete_rows(2, ws.max_row - 1)
+    
+    # Write new data starting from row 2
+    for row_idx, (weight, units, timestamp) in enumerate(pairs, start=2):
+        ws.cell(row=row_idx, column=1, value=weight)
+        ws.cell(row=row_idx, column=2, value=units)
+        ws.cell(row=row_idx, column=3, value=timestamp)
+    
+    # Set COMBINED as the active sheet (default sheet when opened)
+    if 'COMBINED' in wb.sheetnames:
+        wb.active = wb.sheetnames.index('COMBINED')
+    
+    # Save to new filename (never overwrite template)
+    wb.save(output_filename)
+
 def run_update_script():
     try:
         # Run update.sh script
@@ -101,6 +143,7 @@ def process_files():
     base = os.path.splitext(input_file)[0]
     output_file1 = f"{base}.sequential.csv"
     output_file2 = f"{base}.joined.csv"
+    output_xlsx = f"{base}.xlsx"
     
     try:
         with open(input_file, 'r') as f:
@@ -108,7 +151,18 @@ def process_files():
         pairs = parse_logs(log_text)
         write_csv1(pairs, output_file1)
         write_csv2(pairs, output_file2)
-        messagebox.showinfo("Success", f"CSV files generated:\n{output_file1}\n{output_file2}")
+        
+        # Try to write XLSX file
+        xlsx_msg = ""
+        try:
+            write_xlsx(pairs, output_xlsx)
+            xlsx_msg = f"\n{output_xlsx}"
+        except ImportError as e:
+            xlsx_msg = f"\n\nXLSX export skipped: {str(e)}"
+        except Exception as e:
+            xlsx_msg = f"\n\nXLSX export failed: {str(e)}"
+        
+        messagebox.showinfo("Success", f"Files generated:\n{output_file1}\n{output_file2}{xlsx_msg}")
     except Exception as e:
         messagebox.showerror("Error", f"An error occurred: {str(e)}")
 
diff --git a/template.xlsx b/template.xlsx
new file mode 100644
index 0000000..6ca4829
Binary files /dev/null and b/template.xlsx differ