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I want to use an =IF function to display certain text if the date in a cell is a Sunday.

=IF(A2="Sun","Closed","")

The DATE functions do seem very limited compared to Excel.

I have an audio files running in the background while slides are being shown. Is there a way of temporarily pausing it and then restarting or do I have to use an audio editing tool to divide it into two and run each file separately behind their set of slides?
Thanks.