=IF(AND(ISNUMBER(A1),ISNUMBER(A2)),A1+A2,"")

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Best Regards,

Luke M
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"Geo" wrote:

I have the following formula:
A3=SUM(A1+A2)
Is there a way so that A3 only sums if there is a value in both cells and
not if there is text?
The values are hours and minutes.