Of course this must be the easiest to get. But one might be surprised at how poor most firms' information about themselves is. Even today, a great deal of internal information tends to be really about what people 'expect', rather than what it really should be. Large corporations with distributed operations and multiple product lines are even more in the dark about how they operate. Many have only a rough and sketchy idea of their cost structures.
Most information comes to light only after the event.
Information on units, identifying costs and revenues to projects, activities, people etc. is still a very daunting task. Traditional ledger systems fall far short of what is really needed. Not only is this information hard to collate, but is very often of doubtful quality. Unfortunately, managers increasingly are demanding more and more of such information and they are looking to their accountants to provide them with the same. And the accountants are clearly struggling.