The mass and balance information gives:

Basic mass: 1 200 kg
Basic balance arm: 3.00 m

Under these conditions the Basic centre of gravity is at 25% of the mean aerodynamic chord (MAC). The length of MAC is 2m. In the mass and balance section of the flight manual the following information is given:

Position Arm front seats: 2.5 m
Position Arm rear seats: 3.5 m
Position Arm rear hold: 4.5 m
Position Arm fuel tanks: 3.0 m

The pilot and one passenger embark; each weighs 80 kg. Fuel tanks contain 140 litres of petrol with a density of 0.714. The rear seats are not occupied. Taxi fuel is negligible.

The position of the centre of gravity at take-off (as % MAC) is: