Four of you can share a taxi which will take you direct to your hotel, cost is flat rate $45+tolls+tip. The subway to take at Jamaica Station is the E subway, which runs from Jamaica Center to World Trade Center, get off at 42nd St/Port Authority (at 8th Ave) and walk west on 42nd St 1/2 block to your hotel. It will cost $7.25 per person for AirTrain and subway.
Four of you can share a taxi