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\subsection{Elements of Costing}  A detailed costing of the TLEP project does not exist yet, and one of the aims of the starting TLEP design study is to produce it.The total cost of the 80-km version, from an indicative and very preliminary estimate, expressed in arbitrary ``High-energy Collider Funding'' units (HCF), amounts to 7 BHCF.  Not surprisingly, the main cost drivers for the whole complex are expected to be  the tunnel, the shafts and the related services and infrastructure (including access roads), for about 60\% of the price, or 4.1~BHCF. The accelerator and collider rings cover the other 40\%, or 2.9 BHCF, dominated by the 12 GV RF system (1.1~BHCF, including the cryogenics) and the 80 km of magnets (0.8~BHCF). roads).  The TLEP project, however, may be considered as a precursor to the VHE-LHC, in which case the tunnel, corresponding cost would be shared between TLEP and  the tunnel services VHE-LHC. In a very preliminary estimate shown in Table~\ref{tab:cost}, the cost of the accelerator  and collider rings, dominated by  the 12 GV RF system and 80 km of  magnets (which could be used -- possibly recyclable  for the VHE-LHC injector) would injector --, was found to  be shared between TLEP and smaller than  the VHE-LHC. LHC construction cost.  In view of the large number of Higgs bosons expected to be produced analysed  at TLEP (Section~\ref{sec:Higgs}), the cost of each Higgs boson is expected to be exceedingly competitive, be it expressed either in HCF CHF  per Higgs boson or in MW MWh  per Higgs boson~\cite{1308.2629}. %\begin{table}   %\begin{center}   %\caption{\small \begin{table}   \begin{center}   \caption{\small  Table~\ref{tab:cost}: Indicative cost of the TLEP accelerator complex in its 80 km version.\label{tab:cost}}   %\begin{tabular}{|r|r|}   %\hline collider.\label{tab:cost}}   \begin{tabular}{|r|r|}   \hline  Item & Cost (Billion CHF) \\ \hline %\hline Bare tunnel and access shafts & 3.1 \\  %\hline Tunnel services and additional infrastructure & 1.0 \\  %\hline \hline  RF System & 0.9 \\ %\hline \hline  Cryogenics system & 0.2 \\ %\hline \hline  Vacuum system & 0.5 \\ %\hline \hline  Magnets systems for the two rings & 0.8 \\ %\hline \hline  Pre-injector complex & 0.5 \\ \hline %{\bf Total} & {\bf 7.0} \\ \hline  {\bf Total} & {\bf 2.9} \\ \hline  %\end{tabular}  %\end{center}  %\end{table}