"craigwojo" wrote
Thank you to both.

You're welcome, Craig !

Out of curiosity,
since the 2 formulas suggested
are really poles apart <bg,
which gave you the answer you were after ?

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Rgds
Max
xl 97
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GMT+8, 1° 22' N 103° 45' E
xdemechanik <atyahoo<dotcom
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