What is the meaning of these Lido abbreviations?
RCONT is route reserve / contingency fuel:

SKYbrary Fuel - Flight Planning Definitions


  Contingency fuel is carried to account for additional enroute fuel consumption caused by wind, routing changes or ATM: ATM/CNS restrictions. According to ICAO Annex 6, the recommended minimum contingency fuel is the greater of 5% of the trip fuel or 5 minutes holding consumption at 1500' above destination airfield elevation computed based on calculated arrival weight.


In this case the 5 minute holding consumption is greater than the 5% of trip fuel, so it is the one considered in calculation.