In principle this isnt difficult but you would need to plan out how you would want to display it for given amounts. If it was me the way I would do it would be to first create a string of the value
var money_string = str(money)
and after this you can base some logic on the length of your string for instance
if money_string.length() > 4:
print(money_string.left(1) + "." + money_string.right(1) + "k")
would be one simplistic way to do this but may not be the way you want to show it. Try reading through the documentation here
and you can then plan out your logic.