Are they allowed to make you do extra work to convert/generate data in the format asked? I know the other way around in (our local non-US variant of) freedom of

Are they allowed to make you do extra work to convert/generate data in the format asked? I know the other way around in (our local non-US variant of) freedom of information act requests you cannot ask any part of government to make/create/convert data for you, only ask for what they have in the format they have it in.