Hate to break it to you, but any accountant with any data savvy can you give a more or less accurate ballpark figure with the right details. (This is also why you should be chummy with Tim in Accounting; you'll be amazed the things you can pick up shooting the shit with the finance department).

BI, in fact, is almost entirely the artform of synthesizing the answer to that very question for the purposes of executive decisionmaking.