Enter at 2800nm - to the WIND REF line ... adjust to 15kt head wind ...make a pencil mark ...vertically up to 35000ft (interpolate between 33 & 37) ... across to the LANDING WEIGHT REF LINE.

Now adjust to the 50000kg LANDING WEIGHT condition (use the dashed line, this is 37000ft, close enough to 35000ft!).

From the 50000 kg condition, read the scale - should have 17800kg!