(1) Michael Hinman is a pretty flimsy excuse for a journalist. I'm surprised you only found one error with his reporting.
(2) Trying to determine profitability without knowing about all kinds of ancilarry revenue streams, the studio's arrangement with exhibitors, and the actual (not publicized) production (as well prints and advertising) budget means these numbers have to be taken with a few grains of salt, no?
(3) Acknowledging that we'll never have all the information I mentioned in point number two, what source did you use to calculate your figures (or did you just draw from Hinman's article, with more correct figures for STID?).