Not exactly. The problem is that "find" does not use the exit code to indicate that it found something. The exit code indicates whether or not find was successful in looking for something. A non-zero exit code means that an error occurred and a error message was sent to stderr. You will need to count the lines that "find" sends to stdout. ("find" used to work the way you think it should. But Posix "fixed" it.)
36000.17 is pretty gross. 6010 is a bit better. Personally, I would just use 600.