Aging report formula not working for 0-30 days past due

I am so new to using excel that I hope if what I am asking make sense since I don't know all of the lingo. I have created an insurance claim aging report. The columns for 31-60 days, 61-90 days and over 90 days columns are working fine and calculating how they should be. However, for some reason, I can't figure out the 0-30 day column. I will post the formula that I used for the 31-60 day column.

=IF(AND($F6>=31,$F6<=60),$E6,"")

Can anyone tell me how to do the 0-30 day column?

Let me know if this is not enough info in order to help me.

Thanks in advance for any advice given.