Hello, I am looking for some help interpretation some notations at the end of a ship manifest. The last page of the manifest can be found here: https://familysearch.org/pal:/MM9.3.1/TH-1-16936-13682-16?cc=1849782&wc=MX62-6NT:165765601 At the bottom of the list are some math equations with a notation to the side. The notations appear to be 412 [number of passengers minus] 20 col? [equals] 392 [then minus] 320 [equals] 72 ? Does anyone have any idea as to the notations? Thank you, Ann Gilchrest