When I worked for a shipping company back in the early 1970s in Copenhagen, I typed on an old, heavy mechanical typewriter. You know the kind that don't have the digit 1, you used a lower case L instead. I remember typing bills of lading in seven copies, using carbon paper between the sheets. You had to really hit those keys hard for the letters to show up on the bottom of the stack copies. And I used a hand cranked calculator. It looked something like these
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