>>>Are you saying that I should store the current and past balances in every
>>>detail record? That's something I hadn't thought of. (Mulling over the
>>>possibilities...)
>>Stop mulling right now before you do permanent damage. :-) The answer is no!
>Why? That's the best solution I've seen so far.

Because if you delete a detail line somewhere, you have to recompute all the balances after it, for example....