private int getSelectedFuelAmount() {
		if(s.fuelBox == null) return 500;
		int index = s.fuelBox.getSelectedIndex();
		FuelTank tank = model.getRobot().getFuelTank();
		switch(index) {
		case 0:
			return 1;
		case 1:
			return 5;
		case 2:
			return 10;
		case 3:
			return 20;
		case 4:
			int amount = tank.getFuelCapacity() - tank.getFuelLevel();
			return amount;
		}
		return 0;
	}