Doesn't have to be a typo. I don't know it's in the Czech Republic like, but if you inform yourself a bit about the croatian currency "Kuna", these prices could actually fit.

But anyway, this is a game and why could it not have it's own (former) currency?

Disagree, if the demand is higher and the owner is price gouging, a huge feature of emergencies, then price would be in flux.

Hi,
thank you for your nice observation :). This probably would not be worth the effort on fixing and could be explained in multiple ways - consider it an easter egg if you wish.
Regards,
Andy