\documentclass[a4paper,twoside]{scrartcl}
\usepackage[frame]{xy}
\usepackage{tabularx}
\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[danish]{babel}
\setlength{\voffset}{0.5cm}
\setlength{\hoffset}{-2.0cm}
\setlength{\topmargin}{0cm}
\setlength{\headheight}{0.5cm}
\setlength{\headsep}{1cm}
\setlength{\topskip}{0pt}
\setlength{\oddsidemargin}{1.0cm}
\setlength{\evensidemargin}{1.0cm}
\setlength{\textwidth}{19.2cm}
\setlength{\textheight}{24.5cm}
\setlength{\footskip}{1cm}
\setlength{\parindent}{0pt}
\renewcommand{\baselinestretch}{1}
\begin{document}

\newlength{\descrwidth}\setlength{\descrwidth}{10cm}

\newsavebox{\hdr}
\sbox{\hdr}{
  \fontfamily{cmss}\fontsize{10pt}{12pt}\selectfont

  \parbox{\textwidth}{
    \parbox[b]{12cm}{
      <%company%>
      
      <%address%>}\hfill
    \begin{tabular}[b]{rr@{}}
    Tlf. & <%tel%>\\
    Fax & <%fax%>
    \end{tabular}

    \rule[1.5ex]{\textwidth}{0.5pt}
  }
}
    
\fontfamily{cmss}\fontshape{n}\selectfont

\markboth{<%company%>\hfill <%invnumber%>}{\usebox{\hdr}}

\pagestyle{myheadings}
%\thispagestyle{empty}     use this with letterhead paper

<%pagebreak 90 27 37%>
\end{tabular*}

\newpage

\markright{<%company%>\hfill <%invnumber%>}

\vspace*{-12pt}

\begin{tabular*}{\textwidth}{@{}lp{\descrwidth}@{\extracolsep\fill}rll@{}}
  \textbf{Nummer} & \textbf{Beskrivelse} & \textbf{Antal} &
    \textbf{Enhed} & \textbf{Varelager} \\
<%end pagebreak%>


\fontfamily{cmss}\fontsize{10pt}{12pt}\selectfont

\vspace*{2cm}

<%shiptoname%>

<%shiptoaddr1%>

<%shiptoaddr2%>

<%shiptoaddr3%>

<%shiptoaddr4%>

\vspace{3.5cm}

\textbf{F Ø L G E S E D D E L}

\hfill
\begin{tabular}[t]{l@{\hspace{0.3cm}}l}
  \textbf{Dato} & <%invdate%> \\
  \textbf{Nummer} & <%invnumber%> \\
  \textbf{Kunde} & <%customer_id%>
\end{tabular}

\vspace{1cm}

\begin{tabular*}{\textwidth}{@{}lp{\descrwidth}@{\extracolsep\fill}rll@{}}
  \textbf{Nummer} & \textbf{Beskrivelse} & \textbf{Antal} &
    \textbf{Enhed} & \textbf{Varelager} \\
<%foreach number%>
  <%number%> & <%description%> & <%qty%> &
    <%unit%> & <%bin%> \\
<%end number%>
\end{tabular*}


\parbox{\textwidth}{
\rule{\textwidth}{2pt}

\vspace{12pt}

<%if notes%>
  <%notes%>
<%end if%>

}

\vfill
\centerline{\textbf{Tak for ordren!}}

\renewcommand{\thefootnote}{\fnsymbol{footnote}}

\footnotetext[1]{\tiny
Returnerede varer modregnes 10\% i ekspeditionsgebyr.
Et returnummer skal tildeles af <%company%> før varer returneres.
Returvarer skal forsendes forudbetalt og forsvarligt forsikret.
<%company%> kan ikke drages til ansvar for skade under transport.}

\end{document}