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\begin{document}
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{\newpage
\clearpage
\samepage \begin{table}\begin{center}
\begin{tabular}{c|ccc|}
Distillation & \multicolumn{3}{c}{Yield (barrels/barrel) from}\\ 
output & \multicolumn{3}{c}{distillation of}\\ 
\hline
&    Crude 1 & Crude 2 & Crude 3\\ 
\hline
DN &  0.19 &0.16 &0.02  \\ 
DHO &  0.27 &0.32 &0.24  \\ 
DGO &  0.38 &0.27 &0.26  \\ 
P &  0.05 &0.13 &0.39  \\ 
\hline
Price (\$/barrel) &  23.25& 22.00 &20.50\\ 
Available &  60,000& 90,000 &80,000\\ 
(barrels/day) \\ 
\hline
\end{tabular}

\label{tab:output}
\end{center}
\end{table}
}

{\newpage
\clearpage
\samepage \begin{table}\begin{center}
\begin{tabular}{c|ccc|}
Catalytic cracker & \multicolumn{3}{c}{Output (barrels/barrel of feed)}\\ 
outputs &   \\ 
\hline
&    DHO normal  & DHO high & DGO normal\\ 
&    level  & severity level & level\\ 
\hline
Catalytic naptha (CN) &  0.18 &0.32 &0.48  \\ 
Catalytic heating oil (CHO) &  0.80 &0.69 &0.52  \\ 
Pitch (P) &  0.11 &0.10 &0.15  \\ 
\hline
\end{tabular}

\label{tab:coutput}
\end{center}
\end{table}
}

{\newpage
\clearpage
\samepage \begin{table}\begin{center}
\begin{tabular}{c|c|c}
Final Product & Selling price  & Daily demand \\ 
                &  \$/barrel  \\ 
\hline
Gasoline  &  43.25   & Up to 40,000 barrels\\ 
Heating oil  &  39.75   & Up to 40,000 barrels\\ 
Diesel fuel  &  39.00   & Any amount\\ 
Heavy fuel oil  &  30.00   & Any amount\\ 
\hline
\end{tabular}

\label{tab:prices}
\end{center}
\end{table}
}

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\end{document}