Having instructed this high class rubbish for over 20 years & using a razor sharp pencil the CURRENT graph gives you 26000. However these graphs are not the original ones from Boeing when the original questions were set back in 1999. They were digitised back in 2006 and a few of these simplified planning questions no longer gave the original correct answer. As to what they want these days who knows, the list of approved equipment should include a crystal ball. I am not aware of any students having a problem with these in exams, probably as they don't seem to ask many of these questions as they are busy making their money on all the fuel definition & monitoring questions.