\documentclass[11pt,a4paper]{scrartcl}
\usepackage[ngerman]{babel}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage[htt]{hyphenat}
\usepackage{geometry}
\usepackage{tabularx}
\usepackage{array}
\usepackage{lastpage}
\usepackage{fancyhdr}
\usepackage{ragged2e}
\usepackage{microtype}
\geometry{left=25mm,right=20mm,top=25mm,bottom=25mm}
\setlength{\parindent}{0pt}
\setlength{\parskip}{0.8ex}
\pagestyle{fancy}
\fancyhf{}
\fancyhead[L]{%%SENDER_NAME%%}
\fancyhead[R]{%%LABEL_INVOICE_TITLE%% %%INVOICE_NUMBER%%}
\fancyfoot[R]{Seite \thepage\ von \pageref{LastPage}}
\renewcommand{\headrulewidth}{0.4pt}
\renewcommand{\footrulewidth}{0.4pt}
\begin{document}
{\small
\begin{flushright}
%%SENDER_BLOCK%%
\vspace{0.5em}
%%SENDER_CONTACT%%
\end{flushright}
}
\vspace*{10mm}
%%RECIPIENT_BLOCK%%
\vspace*{10mm}
{\Large \textbf{%%LABEL_INVOICE_TITLE%%}}\\[1ex]
%%LABEL_INVOICE_NUMBER%%: \textbf{%%INVOICE_NUMBER%%}\\
%%LABEL_INVOICE_DATE%%: %%INVOICE_DATE%%\\
%%PROJECT_LINE%%
%%LABEL_DUE_DATE%%: %%DUE_DATE%%\\[3mm]
%%INTRO_TEXT%%
\vspace{4mm}
\renewcommand{\arraystretch}{1.3}
\begin{tabularx}{\textwidth}{>{\raggedleft\arraybackslash}p{0.8cm}X
>{\raggedleft\arraybackslash}p{2.2cm}
>{\raggedleft\arraybackslash}p{2.5cm}
>{\raggedleft\arraybackslash}p{2.7cm}}
\hline
\textbf{Pos} & \textbf{Leistung} & \textbf{Menge} & \textbf{Einzelpreis} & \textbf{Betrag}\\
\hline
%%ITEM_ROWS%%
\hline
\end{tabularx}
\vspace{3mm}
\begin{flushright}
\begin{tabular}{rl}
%%LABEL_SUBTOTAL%%: & %%SUBTOTAL%%\\
%%VAT_LINE%%
\textbf{%%TOTAL_LABEL%%:} & \textbf{%%TOTAL%%}\\
\end{tabular}
\end{flushright}
\vspace{4mm}
{\small\textbf{Hinweis:} %%SMALL_BUSINESS_NOTE%%}
\vspace{3mm}
{\small\textbf{Zahlungsbedingungen:} %%PAYMENT_TERMS%%}
\vspace{8mm}
%%OUTRO_TEXT%%
\vspace{10mm}
Mit freundlichen Grüßen\\[4mm]
%%SENDER_NAME%%
\vfill
{\footnotesize
%%FOOTER_BANK%%
}
\label{LastPage}
\end{document}
