In order to find out the amount of fuel which can be uplifted you have to calculate the MTOM, MLM and tank capacity limitation. 
Note: MZFM does not limit fuel. 
BASED ON MTOM:

• MTOM – (ATOM) = 56 000 lb - 49 500 lb = 6500 lb 
  ATOM = DOM + Traffic Load + Take Off fuel = 25 000 lb + 9 500 lb + 15 000 lb = 49 500 lb

BASED ON MLM:

• MLM – Landing mass = 45 000 lb - 39 500 lb = 5500 lb 
  LM = ATOM - Trip fuel = 49 500 lb - 10 000 lb = 39 500 lb 
  => On top of this calculation, for the MLM limitation we have to apply the fuel penalty - which will be burned off during the flight.

Rule of thumb: to calculate fuel penalty, use the following formula: 
(MLM extra / 1000) x Y 
- where "Y" is the variable given by the question, in this case = 200

(5 500/1000) x 200 = 1100 lb

Extra fuel that can be loaded is the sum of MLM extra (5500 lb) and fuel penalty: 
5 500 lb + 1100 lb = 6600 lb

BASED ON FUEL TANK CAPACITY: 
Tank Capacity - Block Fuel = 27 000 lb - (15 000 lb + 300 lb) = 11 700 lb

=> The most restricting value is based on MTOM 6500 lb