Great example of how information is sometimes compartmentalized arbitrarily in the brain: I imagine you have never been confused by sentences such as “I’m running at 10 km/h”.
Dollar signs go before the number, not after it like units. It needs to be 1000 pages/$1 to make sense, whereas 10km and 10h and 10/h all make sense so 10km/h does. I imagine you would be confused by km/h 10 but not $10.
I had to reread that a few times. I assume this means 1000pg/$1 but I'm still not sure about it.