The complex mercury manometer shown below is used to measure the pressure in an oil pipeline. The right side of the manometer is open to the atmosphere, and the left side of the manometer is attached to the pipeline at Point A$.$ Note that the mass density of air is negligible when compared to that of water or mercury.

The gauge pressure at Point A is $75\mathrm{.}1$kPa. Determine the value of $h.$

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