If Statement Formula

[acool]

Hi Everyone, I am currently trying to create an IF Statement Formula which states that if Column A="Yes And Column B<=10 Then 8%, If Not Then 15%
Additional, If Column B="No" And Column B<=15 Then 8%, If Not Then 15%
Any help in creating this formula would be greatly appreciated! Thank You!

 

[Fluff]

How about

=IF(OR(AND(A2="yes",B2<=10),AND(A2="no",B2<=15)),8%,15%)