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%%  Ein Beispiel der DANTE-Edition
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%%  2. Auflage
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%%  Beispiel 06-03-122 auf Seite 286.
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%%  Copyright (C) 2016 Herbert Voss
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%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%%
%%  See http://www.latex-project.org/lppl.txt for details.
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% Show page(s) 1
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\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{193.16928pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{spreadtab,eurosym}
%StopShownPreambleCommands
\begin{document}
\begin{spreadtab}{{tabular}{rr |r}}
@ Monat & @ Einkommen & @ Steuer \\\hline
     1 &  5409    & b2*0.3 \\
     2 &  4523    & b3*0.3 \\
     3 &  4711    & b4*0.3 \\\hline
       & \llap{Summe: :={sum(b2:b4)} \euro}
        & $\sum$: :={sum(C2:C4)}
\end{spreadtab}
\end{document}