5/02 memory size?

Hi all,
This is a real newbie question. I have a SLC 5/02 (1747-524) with 4K user memory. I'm using the old Rockwell software and I'm trying to determine how much memory is actually being used. When I select the file to be loaded, it shows a file size of 55K, I assume that includes documentation, etc. But how do I determine how much of the CPU memory is being used or is available?
Thanks

If you are referring to the APS software then, once the file is loaded press F10 (Memory Map). it will give a summary at the bottom of the memory usage.

The software is RSI (Rockwell Software ???) The mem map shows the number of words used for each file type. Is it just a matter of adding these up?