def build_pdf
      @push_down = 0
      @push_items_table = 0
      @pdf.fill_color '000000'
      build_header
      build_provider_box
      build_purchaser_box
      build_payment_method_box
      build_info_box
      build_items
      build_total
      build_stamp
      build_logo
      build_note
      build_footer
    end
def build_pdf
      @push_down = 0
      @push_items_table = 0
      @pdf.fill_color '000000'
      build_header
      build_provider_box
      build_purchaser_box
      build_payment_method_box
      build_info_box
      build_items
      build_total
      build_stamp
      build_logo
      build_note
      build_footer
    end
Build the PDF version of the document (@pdf)