How to I do this formula to work

[cowgirl]

=IF(AND(I1>="09/01"+0,I1<="11/30"+0)I1>=12/30<=02/29+0)"8.0%","7.5%","9.0%")
I am trying to do a formula that has three different out comes
if I1 (date) is March thru August the % is 7.5
If I1 (date) is Sept thru October the % is 8.0
If I1 (date) is Nov thru Feb the % is 9.0
Can any one help

 

[ETAF]

If year does not matter
how about

=IF(AND(MONTH(I1)>=3,MONTH(I1)<=8), 0.075, IF(AND(MONTH(I1)>=9,MONTH(I1)<=10),0.08,0.09))

 

[cowgirl]

yes that works great, I would have never thought of doing it that way.

 

[GraH - Guido]

or =LOOKUP(MONTH(I1),{1,3,9,11},{0.09,0.075,0.08,0.09})

 

[ETAF]

you are welcome