I did before I posted my comment. It says "After crunching the numbers, he arrived at the figure of $70,000." "Crunching the numbers" does not give details as

I did before I posted my comment. It says "After crunching the numbers, he arrived at the figure of $70,000." "Crunching the numbers" does not give details as to how he arrived to 70K. The article made a reference to report by Daniel Kahneman and Angus Deaton, but it is not clear. Have I missed something?