Still not alot of money compared to what banks spend sorting out problems today.

So I was the coder for a payroll system for those paid out of the channel islands, in 2008, day after boxing day I was asked to add 3 more digits to the payroll system so a trader could be paid a bonus. That system moved alot of money all around the world.

Another example of costs. $81million nicked from Federal Reserve Bank of New York. https://www.reuters.com/article/us-cyber-heist-bangladesh-id...

Here is an example of what has to be paid out when things go wrong, it was made into a film, adjust for inflation and quantitative easing.

https://en.wikipedia.org/wiki/Nick_Leeson#Downfall_and_impri... https://www.imdb.com/title/tt0131566/

Best office I have seen is Nomura's directors office in London. You could fit a house in it!