I assume MTOW must mean the total take-off weight, not the cargo weight. In https://en.wikipedia.org/wiki/Boeing_747-400#Specifications https://en.wikipedia.org

I assume MTOW must mean the total take-off weight, not the cargo weight. In https://en.wikipedia.org/wiki/Boeing_747-400#Specifications https://en.wikipedia.org/wiki/Boeing_747-400#Specifications it suggests about 125 tonnes, which - if I'm correct - means that quoting the MTOW is unhelpful. Also looking at https://en.wikipedia.org/wiki/Boeing_747-400#Retirement_and_economic_value https://en.wikipedia.org/wiki/Boeing_747-400#Retirement_and_... it disagrees with running costs you say "The 747-400's leasing, resale and salvage value has dropped steeply because it is relatively expensive to operate. As most 747-400s are now more than 20 years old, airlines are beginning to replace them. Airlines using the 747-400 have been retiring the model, replacing it with more fuel efficient aircraft"