Perhaps try, array-entered
(i.e. press CTRL+SHIFT+ENTER):

=SUM(LINEST(A$3:A$6,B$3:B$6)*D2:E2)

where D2 will house: 61590 (say)
and E2 will contain: 1
--
Rgds
Max
xl 97
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GMT+8, 1° 22' N 103° 45' E
xdemechanik <atyahoo<dotcom
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"RW" wrote in message
...
I am using the following formula:
=SUM(LINEST(A$3:A$6, B$3:B$6)*{61590,1})

I need to use a value from a cell rather than typing the value (61590 in
the
above equation) into the formula each time. I have tried using quotes,
parentheses, brackets, etc. without any luck.

I am using Excel 2002. How is this done?

Thanks