To find the ZFM you must add the DOM + Traffic load =48600.

This info can be found from the left hand side of the load and trim sheet.

There is only one answer with this value of ZFM.

Enter right side of loadsheet at the DOM index, 33.5, follow direction and scale arrows for the individual compartment loads.

Finally in compartment Og draw a vertical line back up to the index grid to read 57.0