Your median income figure appears to be wrong. I think that you might be using  median household income rather than median per-capita income. The $680k (sic) figure is also in 1987 USD, and if you don&#x27;t adjust for inflation then it throws your calculations off. See <i>The College Payoff: Education, Occupations, Lifetime earnings</i> [0] for a rigorous assessment. What you said about buying stock vs paying for college is interesting and something to consider.<p>[0] <a href="https:&#x2F;&#x2F;repository.library.georgetown.edu&#x2F;handle&#x2F;10822&#x2F;559300" rel="nofollow">https:&#x2F;&#x2F;repository.library.georgetown.edu&#x2F;handle&#x2F;10822&#x2F;55930...</a>