Or perhaps the dimension was length, rather than weight?

> the corresponding receipt, then pinned them together and sent out a check, usually a few months late. To figure out how much money the company owed, they stacked up all the bills, measured them with a ruler, and through a formula of unknown provenance turned feet into dollars.

From _The Fires_ by Joe Flood (2010) Cited in https://www.reddit.com/r/WarCollege/comments/18z6i09/comment...

But I could not find a quote in the Macnamara interviews from the _Fog of War_ https://www.errolmorris.com/film/fow_transcript.html as cited by https://forum.woodenboat.com/forum/the-bilge/28529-the-film-...