A U-tube manometer is used to measure the pressure drop across an orifice. Liquid A is mercury (p = 13590 kg/m3) and fluid B, flowing through the orifice and filling the manometer leads, is brine (p = 1260 kg/m3). When the pressure at the taps are equal, the level of the mercury in the manometer is 0.9 m below the orifice taps. The gauge pressure at the upstream tap is 0.14 bar; the pressure at the downstream tap is 250 mmHg below atmospheric. What is the reading of the manometer in millimeters?