That is a stacked sequence structure. You can have a stacked sequence or a flat sequence. There is no such thing as a "stacked flat sequence structure".
So what issues are you having writing to an Excel file? I don't see any attempt in those screenshots.
Do you actually want to write to an Excel file, or to a text based file such as a comma separated value file (CSV)?
Create another sequence at the end. (I hate stating this as sequence structures are not recommended other than for specific uses, and stacked sequences I don't recommend at all.) In that last step, take the results from your earlier steps, gather than up and write them to the file.
Search LabVIEW help and the forums for examples on writing to a file or working with Excel .xls files directly. If you are still stuck, attach your latest .vi that shows the attempt.
