A U$-$tube manometer is installed across an oriface meter. The manometer is filled with mercury $($specific gravity $13\mathrm{.}6),$ and the liquid above the mercury is carbon tetrachloride $($specific gravity $1\mathrm{.}6).$ The menometer reads $200$ mm $($Hg$).$ What is the pressure difference over the manometer in kilopascals? What is percent error if the density of CCl$4$ is neglected?