budgeting

[Daniel Hagerty]

 > But isn't that completely arbitrary? I mean, unless you bought one
 > single thing with your card, saying that "I paid off this but not
 > that" just seems to be a mental fiction that doesn't serve any
 > purpose.

    Your credit card company will disagree.  They've got to manage an
ordering for partial payments, even if you don't.

    While "completely arbitrary", so is inventory management, tax lot
accounting, and many other things that show up in accounting.
Nonetheless, questions arise that need you to make an arbitrary
decision to arrive at an answer.  You may need to record some data to
support the arbitrary decision.

    If the answer is "don't ask that question", fine.  There may be
interesting things that can be derived from this kind of data.  You
can't ask if you don't have it.