\documentclass{scrartcl}
\usepackage[latin1]{inputenc}
\usepackage{tabularx}
\usepackage[letterpaper,top=2cm,bottom=1.5cm,left=1.1cm,right=1.5cm]{geometry}
\usepackage{graphicx}

\begin{document}

\pagestyle{myheadings}
\thispagestyle{empty}

\fontfamily{cmss}\fontsize{9pt}{9pt}\selectfont

\parbox[t]{12cm}{
  <?lsmb company ?>

  <?lsmb address ?>}
\hfill
\parbox[t]{6cm}{\hfill <?lsmb source ?>}

\vspace*{0.6cm}

<?lsmb text_amount ?> \dotfill <?lsmb decimal ?>/100 \makebox[0.5cm]{\hfill}

\vspace{0.5cm}

\hfill <?lsmb datepaid ?> \makebox[2cm]{\hfill} <?lsmb amount ?>

% different date format for datepaid
% <?lsmb DD ?><?lsmb MM ?><?lsmb YYYY ?>

\vspace{0.5cm}

<?lsmb name ?>

<?lsmb address1 ?>

<?lsmb address2 ?>

<?lsmb city ?>
<?lsmb if state ?>
\hspace{-0.1cm}, <?lsmb state ?>
<?lsmb end state ?>
<?lsmb zipcode ?>

<?lsmb country ?>

\vspace{1.8cm}

<?lsmb memo ?>

\vspace{0.8cm}

<?lsmb company ?>

\vspace{0.5cm}

<?lsmb name ?> \hfill <?lsmb datepaid ?> \hfill <?lsmb source ?>

\vspace{0.5cm}
\begin{tabularx}{\textwidth}{lXrr@{}}
\textbf{Invoice \#} & \textbf{Invoice Date}
  & \textbf{Amount Due} & \textbf{Applied} \\
<?lsmb foreach invnumber ?>
<?lsmb invnumber ?> & <?lsmb invdate ?> \dotfill
  & <?lsmb due ?> & <?lsmb paid ?> \\
<?lsmb end invnumber ?>
\end{tabularx}

\vspace{1cm}

<?lsmb memo ?>

\vfill
<?lsmb message ?>
\end{document}

