cinder minnow
I ran out of space in the title, should say "seems to cost credits".
I'm building "Unnamed Ship" near that Ceopem Station. The included autosave should be ready for you to press "just make it so" or whatever the button name is to start building for resources (scrap nearby). After pressing it, you can see that you can cancel it for 7500 credits. If you continue building the ship, credits won't be deducted and the refund amount (in credits) will change to 5000, then 3500 and so on, but as far as I can tell you don't actually pay credits here even though it says you can get a credit refund, which is confusing.
(P.S. I'm practically playing on a potato powered computer today so I'm unable to verify whether the repro is accurate at the moment due to several minutes loading time, feel free to ping me over the weekend if I need to tweak the instructions for a repro).
thin folio