Combining Expressions using AND OR statements

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I am hoping someone can assist me. I created a report (definition attached).

I am wondering how I could combine the Update and New columns together.

For example:

Column 1 (sums how many updated incidents are more than 10 hours old since the time it was updated)

sum(if(incidents.status_id=8 & date_diff(sysdate(), incidents.updated)<3600*$sl10, 1,0))

 

Column 2 (sums how many new incidents are more than 10 hours old since the time it was created)

sum(if(incidents.status_id=1 & date_diff(sysdate(), incidents.created)<3600*$sl10, 1,0))

 

I would like to combine these two into one column to show how many updated or new incidents are more than 10 hours old from the time created or updated.