\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}{
      <?lsmb company ?>
      
      <?lsmb address ?>}\hfill
    \begin{tabular}[b]{rr@{}}
    Tlf. & <?lsmb tel ?>\\
    Fax & <?lsmb fax ?>
    \end{tabular}

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

\markboth{<?lsmb company ?>\hfill <?lsmb invnumber ?>}{\usebox{\hdr}}

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

<?lsmb pagebreak 65 27 37 ?>
\end{tabular*}

  \rule{\textwidth}{2pt}
  
  \hfill
  \begin{tabularx}{7cm}{Xr@{}}
  \textbf{Subtotal} & \textbf{<?lsmb sumcarriedforward ?>} \\
  \end{tabularx}

\newpage

\markright{<?lsmb company ?>\hfill <?lsmb invnumber ?>}

\vspace*{-12pt}

\begin{tabular*}{\textwidth}{@{}lp{\descrwidth}@{\extracolsep\fill}rlrrr@{}}
  \textbf{Nummer} & \textbf{Beskrivelse} & \textbf{Antal} &
    \textbf{Enhed} & \textbf{Pris} & \textbf{Rabat} & \textbf{Beløb} \\
  & overført fra side <?lsmb lastpage ?> & & & & & <?lsmb sumcarriedforward ?> \\
<?lsmb end pagebreak ?>


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

\vspace*{2cm}

<?lsmb name ?>

<?lsmb address1 ?>

<?lsmb if address2 ?>
<?lsmb address2 ?>
<?lsmb end address2 ?>

<?lsmb city ?> <?lsmb state ?> <?lsmb zipcode ?>

<?lsmb if country ?>
<?lsmb country ?>
<?lsmb end country ?>

\vspace{3.5cm}

\textbf{F A K T U R A}
\hfill
\begin{tabular}[t]{l@{\hspace{0.3cm}}l}
  \textbf{Dato} & <?lsmb invdate ?> \\
  \textbf{Nummer} & <?lsmb invnumber ?> \\
  \textbf{Kunde} & <?lsmb customer_id ?>
\end{tabular}

\vspace{1cm}

\begin{tabular*}{\textwidth}{@{}lp{\descrwidth}@{\extracolsep\fill}rlrrr@{}}
  \textbf{Nummer} & \textbf{Beskrivelse} & \textbf{Antal} &
    \textbf{Enhed} & \textbf{Pris} & \textbf{Rabat} & \textbf{Beløb} \\
<?lsmb foreach number ?>
  <?lsmb number ?> & <?lsmb description ?> & <?lsmb qty ?> &
    <?lsmb unit ?> & <?lsmb sellprice ?> & <?lsmb discount ?> & <?lsmb linetotal ?> \\
<?lsmb end number ?>
\end{tabular*}


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

\vspace{0.2cm}

\hfill
\begin{tabularx}{7cm}{Xr@{}}
  \textbf{Subtotal} & \textbf{<?lsmb subtotal ?>} \\
<?lsmb foreach tax ?>
  <?lsmb taxdescription ?> på <?lsmb taxbase ?> & <?lsmb tax ?> \\
<?lsmb end tax ?>
<?lsmb if paid ?>
  \textbf{Betalt} & - <?lsmb paid ?> \\
<?lsmb end paid ?>
  \hline
  \textbf{At betale} & \textbf{<?lsmb total ?>} \\
\end{tabularx}

\vspace{0.3cm}

\hfill
  Alle priser i \textbf{<?lsmb currency ?>}.

\vspace{12pt}

<?lsmb if notes ?>
  <?lsmb notes ?>
<?lsmb end if ?>

}

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

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

\footnotetext[1]{\tiny
Betalingsfrist <?lsmb terms ?> dage fra fakturadato. Betaling herefter påregnes
1.5\% per påbegyndt måned startende <?lsmb duedate ?> og indtil det fulde beløb
er betalt. Returnerede varer modregnes 10\% i ekspeditionsgebyr.
Et returnummer skal tildeles af <?lsmb company ?> før varer returneres.
Returvarer skal forsendes forudbetalt og forsvarligt forsikret.
<?lsmb company ?> kan ikke drages til ansvar for skade under transport.}

\end{document}