My question is similar to "Dollars' worth" vs. "dollars worth" for numerals but for numerals that are followed by a currency abbreviation.
When it's spelled out, it's clear that the "worth of" construction uses a possessive: "It uses 100 dollars' worth of electronics."
But when "dollars" is replaced by a currency code like USD, I'm not sure how to properly form a possessive on the phrase "100 USD."
All of these look incorrect or strange to me in a "worth of" context. Which is correct?
- 100 USD' worth of electronics — since the D stands for "dollars" here, maybe, but looks like a typo since there's no visible 's'
- 100 USDs' worth of electronics — doesn't seem correct unless you're pronouncing "ewe ess dees" out loud (but I would normally say something like "100 American/US dollars' worth," "100 dollars' (US) worth," "100 dollars worth (US)" instead); it's not normally written "USDs"
- 100 USD worth of electronics — best bet?
…or something else I hadn't considered?