I knew this from Art Lessons
I used to repair Typeset 8s (Digital Equip Corp 8 bit computers) at several newspapers. EG: Hayward's Daily Review, and something in Chico. Mid 70s were a while ago.
Note: I used to get a trouble call EVERY Friday around 4 PM from the Daily review. Their contract was 8 Hrs M-F. The LAST time they did this I went to the computer before speaking to the customer. It was running fine. I called the office and the customer was also on the phone telling my boss it had been down for quite some time and where the hell was the repair guy. Our contract specified a work-through (extension of contract hours if the problem had already been called in,). The customer was POed that I had gone to the computer 1st, but they stopped calling EVERY Friday unless it was really broken.
Upon arrival they used to say, "We got it back up just before you got here".
This also happened with the previous guy responsible for the site.
I don't believe your 'answer' is correct. I believe the terms upper-case & lower-case derive from the fact that the original type-setters, who were very skilled artisans, used to carry their own typeset fonts in cases from one printer to another. They simply organised their cases with non-cap letters on the lower section and capitals in the upper section.
The correct answer is shelving like HTG said.
When I saw "Shelving" as one of the choices, I thought they meant terms used when building or installing shelving, which is why I chose "cost of ink". The answer is not incorrect, but it's not quite correct, either. Larger letters - uppercase or capital - do use more ink than lower case letters - small - do. I think "cost of ink" is therefore a better answer.
That picture is sort of funny, as it looks like there is a HUGE hole in the guys pants !!!
The letters were arranged on the shelving according to the likelihood of them being used...the most frequently used ones were placed closer to the person printing. It's all based on the least time and motion.