\documentclass[12pt]{article}
\usepackage{german}
\usepackage{eurosym}
\usepackage[a4paper, left=2cm, right=2cm, top=2cm]{geometry}

\begin{document}


Haus: $details['description']
Jahr: $year

\begin{tabular}{|p{5cm}|r|r|r|}

\hline Art & Wohnungen & andere Fl"achen & gesamt \\

\hline Fl"ache & $areas['flat_area'] & $areas['other_area'] & $areas['total_area'] \\
\hline Faktor & #echo '%.10f' % $areas['flat_factor'] # & #echo '%.10f' % $areas['other_factor'] # & \\


#for $item in $overhead_items
\hline $item['category'] & #echo '%.2f' % $item['flat_part'] # & #echo '%.2f' % $item['other_part'] # & #echo '%.2f' % $item['sum'] # \\
#end for

\hline Zwischensumme & #echo '%.2f' % $flat_sum # & #echo '%.2f' % $other_sum # & #echo '%.2f' % $total_sum # \\
\hline Umlageausfallwagnis & #echo '%.2f' % $umlage_ausfall_wagnis # & & \\
\hline Summe & #echo '%.2f' % $flat_sum_2 # & & \\

\hline Anteil / Monat / m2 & #echo '%.10f' % $part_by_montharea # & & \\
\hline 

\end{tabular}

\end{document}