Backups, Calculator anomaly

[Fred Bone]

On 27 Nov 2007 at 9:46, JUNIPER said:

[...]
>    On another matter: Tools -> financial calculator anomaly... Trying to
>    find out how much sooner my mortgage would be paid off by increasing my
>    payment, no matter what values I use I get an enormous and wrong
>    "payment Periods" result. For example, entering $10,000 as the "Present
>    Value," 6% as the interest, $1139.15 as the payment, and zero as the
>    "future value" I get 4,294,967,287 "Payment Periods." In fact, no
>    matter what values I use I get results of 4 1/4 billion or so.

So do I, if I insist on asking it how many more loans it takes to get the 
mortgage down to zero.

Try giving the "periodic payment" an opposite sign to that for the 
"present value".