I am trying to add a formula that will give "n/a" in a cell a value based on info in header.
The formula i found in google forum is
=sum(arrayformula(if(C9:C33="N/A",value(mid(B9:B33,2,search(")",B9:B33)-2)),C9:C33)))
But results in error. Below is what my spreadsheet looks like...