LaTeX Forum

\documentclass[fontsize=10pt,headings=small,paper=90mm:121mm]{scrartcl}

\usepackage[german]{babel}
\usepackage{fontspec}
\setmainfont{TeX Gyre Pagella}
\usepackage[top=2mm,left=2mm,bottom=2mm,right=2mm]{geometry}
\pagestyle{empty}

% First suggestion with measuring boxes
\newsavebox\testbox
\newcommand*{\threecolumns}[3]{%
  \savebox\testbox{%
    \parbox{\dimexpr \linewidth-7em}{\strut#2 \dotfill}%
  }
  \raisebox{\dimexpr\ht\testbox-\ht\strutbox}{\makebox[2em]{#1}}\quad
  \usebox\testbox\quad
  \makebox[3em][r]{#3}%
}

% Second and easy suggestion with fake with \makebox
\newcommand*{\easythreecolumns}[3]{%
  \makebox[3em][l]{#1}%
  \parbox[t]{\dimexpr \linewidth-7em}{%
    \strut#2\strut\dotfill\makebox[0pt][l]{\makebox[4em][r]{#3}}%
  }%
}
\begin{document}
\begin{flushleft}
  \threecolumns{Nr. 1}{Kurzer Text}{30\,000}\\
  \threecolumns{Nr. 2}{Längerer Text Längerer Text Längerer Text Längerer Text}{35\,000}\\
\end{flushleft}

\begin{flushleft}
  \easythreecolumns{Nr. 1}{Kurzer Text}{30\,000}\\
  \easythreecolumns{Nr. 2}{Längerer Text Längerer Text Längerer Text Längerer Text}{35\,000}\\
\end{flushleft}

\end{document}

\documentclass[fontsize=10pt,headings=small,paper=90mm:121mm]{scrartcl}

\usepackage[german]{babel}
\usepackage{fontspec}
\usepackage{tabularx}
\setmainfont{TeX Gyre Pagella}
\usepackage[top=2mm,left=2mm,bottom=2mm,right=2mm]{geometry}
\pagestyle{empty}

\begin{document}

\noindent
\begin{tabularx}{\textwidth}{lXl}
  Nr. 1&Kurzer Text\dotfill&€ 30\,000\\
  Nr. 2&Längerer Text Längerer Text Längerer Text Längerer Text\dotfill&€ 35\,000\\
\end{tabularx}

\noindent
\begin{tabular}{lp{53mm}l}
  Nr. 1&Kurzer Text\dotfill&€ 30\,000\\
  Nr. 2&Längerer Text Längerer Text Längerer Text Längerer Text\dotfill&€ 35\,000\\
\end{tabular}

\end{document}