I need to enhance this formula to account for another condition.

In English: if F7= Lease or Referral the result is -0- (end)
Next condition: If F7 is Buyer or Seller then it must look at P7 for commission amount and if the commission is less than 2000 the result is -0-, if the commission shown in P7 is greater than 2000, then I need result of ROUNDUP(N7/250000,0)*50)

=IF(OR(F7="Lease",F7="Referral"),0,IF(OR(F7="Buyer",F7="Seller"),(ROUNDUP(N7/250000,0)*50)))