Apart from the small size, that looked a lot like something I was stuck with for a while. The source for that project varied from 100MB to 250MB, because of slightly different customised versions for clients. It was written in an ancient dialect of BASIC that runs on no current system, so it had to be emulated. It could have been replaced in 6 months by two dedicated programmers for far less than it cost to buy the rights to the whole thing in the first place, but only one of us was that dedicated. There was a third guy, but he was of course an external consultant dedicated to knowing this system, and charging in limbs for maintenance.
It's possibly that the system I worked on was the code-bloated version of the accounting system above. It did both accounting and PoS tasks, and then some.