033 - FLIGHT PLANNING AND FLIGHT MONITORING

According to the chart the minimum obstruction clearance altitude (MOCA) is 8500 ft. The meteorological data gives an outside air temperature of -20° C at FL 85. The QNH, given by a meteorological station at an elevation of 4000ft, is 1003 hPa. What is the minimum pressure altitude which should be flown according to the given MOCA?