%% 
%%  A DANTE-Edition example
%% 
%%  Example 02-14-5 on page 78.
%% 
%%  Copyright (C) 2010 Herbert Voss
%% 
%%  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.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{201.70511pt}
\setlength\parindent{0pt}

\usepackage{spreadtab}

\begin{document}
\begin{spreadtab}{{tabular}{rr |r}}
@ month & @ income & @ tax \\\hline
      1 &  5409    & b2*0.3 \\
      2 &  4523    & b3*0.3 \\
      3 &  4711    & b4*0.3 \\\hline
        & b2+b3+b4 & B5*0.3
\end{spreadtab}
\end{document}