Sorry, posted reply to another question!
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Kind regards,

Niek Otten

"Niek Otten" wrote in message ...
=IF(A1-B1<0,"-","")&TEXT(ABS(A1-B1),"hh:mm")

If you want to calculate with it, use just =A1-B1. It will not show the way you want, but further calculations are correct.

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Kind regards,

Niek Otten

"LAHM" wrote in message oups.com...
Hi,

Does anybody know why XNPV appears not to accept negative rates?

e.g. using the example in the Excel 2003 help: (i.e. amounts = -10000,
2750, 4250, 3250, 2750, dates = 01 Jan 2008, 01 Mar 2008, 30 Oct 2008,
15 Feb 2009, 01 Apr 2009) returns #NUM! for rates 0 or below. That is
=XNPV(0,amounts, dates). However when I composed a VBA function to
duplicate the formula for XNPV, as shown in the help, the value is 3000
when the rate is zero.

thanks,
L.