How do I use the IF function to calculate date

[Pulling My Hair Out!]

I am creating a statement form. I need it to take the date of each item on
the statement and calculate whether that item is less than 30 days, 31-60
days pastdue, 61-90 days past due, and finally over 90 days past due.
Depending on the out come of the value, I would like the amount of each item
placed into the appropriate box (current, 1-30 days past due, etc...)
Wow, upon reading the above, I think I've managed to confuse my self!

 

[Peo Sjoblom]

=IF(AND(TODAY()-A1<31,TODAY()>A1),"Less than or equal to
30",IF(AND(TODAY()-A1>30,TODAY()-A1<61),"Between 31 and 60
days",IF(AND(TODAY()-A1>60,TODAY()-A1<91),"Between 61 and 90
days",IF(TODAY()-A1>90,"more than 90 past","Not past"))))

or better

=IF(TODAY()>A1,VLOOKUP(TODAY()-A1,{0,"Less than or equal to 30";31,"Between
31 and 60";61,"Between 61 and 90";91,"Over 90"},2),"Not past due")

Regards,

Peo Sjoblom