excel = WIN32OLE.new 'Excel.Application'
excel.visible = true
workbook = excel.Workbooks.open "path/to/file"
sheet = workbook.Worksheets 1


      def excel_copy_and_paste_last_row excel, workbook, sheet
        last_row = sheet.UsedRange.Rows.Count
        sheet.Rows(last_row).copy
        sheet.Cells(last_row + 1, 1).Select
        workbook.ActiveSheet.Paste
        excel.CutCopyMode = false
      end

      def excel_save_and_close excel, workbook
        # save xlsx
        workbook.Saved = true
        workbook.Save
        # close excel
        excel.activeworkbook.close 0
        excel.quit
      end