Refer to figure.
Note: This was reported as a type-in style question

Standard Masses (need to learn these) are in EASA-OPs and NOT the same as given in the demonstration load sheet for the MRJT in the CAP.

• Flight Crew = 85 kg
• Cabin Crew = 75 kg

Both the pilot's seats and the observer (jump) seats have a negative valued effect on the CG. This means all these seats on the flight deck are forward of the CG.

2 Pilots at standard mass = 2 x 85 kg = 170 kg

• The index influence from the table is: -0.0169 per kg
• 170 kg x -0.0169 = -2.873

For the question scenario:

1 pilot at standard mass + 1 pilot at 68 kg = 85 + 68 = 153 kg

• The index influence from the table is -0.0169 per kg
• 153 kg x -0.0169 = -2.5857

Also, 1 observer at standard mass 85 kg

• The index influence from the table is -0.0160 per kg for seat 2.
• 85 kg x -0.0160 = -1.36

Total effect of the crew is: -2.5857 + (-1.36) = -3.9457

The difference in the crew's DOI from a standard crew is: -3.9457 and -2.873 = 1.0727 further forward

EASA AIR OPS 
Regulation (EU) No 965/2012 
AMC2 CAT.POL.MAB.100(d) Mass and balance, loading 
Mass Values for Crew Members 
(a) The operator should use the following mass values for crew to determine the dry operating mass: 
(1) actual masses including any crew baggage; or 
(2) standard masses, including hand baggage, of 85 kg for flight crew/technical crew members and 75 kg for cabin crew members. 
(b) The operator should correct the dry operating mass to account for any additional baggage. The position of this additional baggage should be accounted for when establishing the centre of gravity of the aeroplane.