# File lib/spreadsheet/workbook.rb, line 200
   def store_all_xfs
      xf = @format.xf_biff(0xFFF5)
      for n in 1..15
         append(xf)
      end

      xf = @format.xf_biff(0x0001)
      append(xf)
         
      @formats.each{ |format|
         xf = format.xf_biff(0x0001)
         append(xf)
      }
   end