Tweakes to invoice

Question

I need help fine tuning this document. I basically need three things:

1. Get rid of the duplicate company information on top of "Client"
2. Be able to stamp today's date automatically. I tried using "datetime" package but every time I run the script it collapses.
3. Calculate the tax automatically (can that be done in LaTeX?)

PS: the example comes with an external file called "template.lco" Inside that file I found the following:

\ProvidesFile{template.loc}[]

% firstfootvpos has to have more space to the bottom
\@setplength{firstfootvpos}{\paperheight}
\@addtoplength[-]{firstfootvpos}{30mm}

And here's the code for the actual document:

\documentclass[DIN, pagenumber=false, parskip=half, 
fromalign=right, 
fromphone=true, 
fromfax=false,
fromrule=false]{scrlttr2}

\usepackage[spanish]{babel} 
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{textcomp}
\usepackage{longtable}
\usepackage{eurosym}
\usepackage{datetime}

\LoadLetterOption{template}
\newcommand{\stdlohn}[0]{18 \% }
\renewcommand*{\raggedsignature}{\raggedright} 

\setkomavar{fromname}{Company}
\setkomavar{fromphone}{+49 (0) 123 / 1234 1234}
\setkomavar{fromaddress}{Address}
\setkomavar{frombank}{Bank info}

\setkomavar{subject}[]{Service description}
\setkomavar{yourmail}[Code]{BAG-EB-00001}
\setkomavar{date}[Date]{06 July 2015}

\firstfoot{
\parbox[t]{\textwidth}{\footnotesize 

\begin{tabular}[t]{l@{}}
\multicolumn{1}{@{}l@{}}{\textbf{Company:}}\\ 
Info \\
\end{tabular}
\hfill{}
\begin{tabular}[t]{l@{}}
\multicolumn{1}{@{}l@{}}{\textbf{Bank:}}\\ 
Bank name\\
\end{tabular}
}}

\begin{document}

\begin{letter}{
\textbf{Client}\\ 
Name\\
}

\opening{\ }
\vspace{-1.9cm}

\begin{longtable}{p{7.8cm}p{1.0cm}p{1cm}p{2.7cm}p{2.5cm}}
\hline  
Description & Amount & U & Price & Total\\
\hline 

\textbf{Service}\\
Service & 1 & H & USD 60.00 {} & USD 60.00{}\\ \\
\hline\hline 
\end{longtable}

\begin{longtable}{p{5.5cm}p{3cm}p{3cm}}
\hline A & \stdlohn Tax & B\\
\hline 
USD 6,000.00{} & USD 6,000.00 & \textbf{USD 6,000.00}{}\\
\hline 
\hline  
\end{longtable}

\end{letter}
\end{document}

Answer 1

I will only answer the first two questions.

If you do not want the back address on top of the "Client" use the class option

backaddress=false

To set the to set the todays stamp automatically in spanish remove \usepackage{datetime} and remove \setkomavar{date}[Date]{06 July 2015}.

Code:

\begin{filecontents*}{template.lco}
\ProvidesFile{template.lco}[]

% firstfootvpos has to have more space to the bottom
\@setplength{firstfootvpos}{\paperheight}
\@addtoplength[-]{firstfootvpos}{30mm}
\end{filecontents*}

\documentclass[DIN, pagenumber=false, parskip=half, 
fromalign=right, 
fromphone=true, 
fromfax=false,
fromrule=false,
backaddress=false,
% numericaldate
]{scrlttr2}

\usepackage[spanish]{babel}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{textcomp}
\usepackage{longtable}
\usepackage{eurosym}
%\usepackage{datetime}% <- removed

\LoadLetterOption{template}
\newcommand{\stdlohn}[0]{18 \% }
\renewcommand*{\raggedsignature}{\raggedright} 

\setkomavar{fromname}{Company}
\setkomavar{fromphone}{+49 (0) 123 / 1234 1234}
\setkomavar{fromaddress}{Address}
\setkomavar{frombank}{Bank info}

\setkomavar{subject}[]{Service description}
\setkomavar{yourmail}[Code]{BAG-EB-00001}
%\setkomavar{date}[Date]{06 July 2015}% <-removed

\setkomavar{firstfoot}{% <- changed
\parbox[t]{\textwidth}{\footnotesize 

\begin{tabular}[t]{l@{}}
\multicolumn{1}{@{}l@{}}{\textbf{Company:}}\\ 
Info \\
\end{tabular}
\hfill{}
\begin{tabular}[t]{l@{}}
\multicolumn{1}{@{}l@{}}{\textbf{Bank:}}\\ 
Bank name\\
\end{tabular}
}}

\begin{document}

\begin{letter}{
\textbf{Client}\\ 
Name\\
}

\opening{\ }
\vspace{-1.9cm}
\begin{longtable}{p{7.8cm}p{1.0cm}p{1cm}p{2.7cm}p{2.5cm}}
\hline  
Description & Amount & U & Price & Total\\
\hline 

\textbf{Service}\\
Service & 1 & H & USD 60.00 {} & USD 60.00{}\\ \\
\hline\hline 
\end{longtable}
\begin{longtable}{p{5.5cm}p{3cm}p{3cm}}
\hline A & \stdlohn Tax & B\\
\hline 
USD 6,000.00{} & USD 6,000.00 & \textbf{USD 6,000.00}{}\\
\hline 
\hline  
\end{longtable}
\end{letter}
\end{document}

Note that I have changed \firstfoot{...} to \setkomavar{firstfoot}{...}. That is the uptodate syntax.

---

If the language of your document is english you can change the babel option to english. Then use

\usepackage[english]{isodate}\cleanlookdateon

instead loading datetime and remove \setkomavar{date}[Date]{06 July 2015} to set the todays stamp automatically in the same format.

Answer 2

EDIT: I changed the code to a MWE.

With the two commands you can print the taxes only or the sum of both values. You can place them wherever you want them to appear.

\documentclass{standalone}
\usepackage{pgf,pgfmath}

\pgfkeys{/pgf/number format/.cd,
    fixed,
    fixed zerofill,
    precision=2,
    set thousands separator={.},
    set decimal separator={,}
    }

\newcommand{\taxes}[2]{%
    \pgfmathparse{#1*#2/100}%
    \pgfmathprintnumber{\pgfmathresult}%
    }

\newcommand{\addtaxes}[2]{%
    \pgfmathparse{#1+#1*#2/100}%
    \pgfmathprintnumber{\pgfmathresult}%
    }

\def\taxval{18}
\def\money{4.5}

\begin{document}
\begin{tabular}{cr}
Worktime & \pgfmathprintnumber{\money} \\
Taxes (\taxval\,\%)& \taxes{\money}{\taxval} \\
Sum & \addtaxes{\money}{\taxval}
\end{tabular}
\end{document}