Google Sheets IF THIS AND ELSE OR

Question

I'm having some issues trying to accomplish the below in a google sheet. What I'd like to have happened is:

IF Cell O1 has a value of "Yes" AND Cell E1 is <= 25,000 
Cell P1 = "DEFM-HW-A"

OR Cell O1 has a value of "Yes" AND Cell E1 is > 25,000 
Cell P1 = "DEFM-HW-B"

OR IF O1 = "No"
Cell P1 = "No"

Answer 1

Use this in P1:

=IF(O1="Yes",IF(E1<=25000,"DEFM-HW-A","DEFM-HW-B"),"No")