AkashAgr

I'm looking for a solution to set max affiliate commission on any order. Currently I'm offerring 10% of the billed amount. What I want: 1. If 10% of billed amount is greater than 1000, then the max amount referral will get is 1000 only. 2. If 10% of billed amount is less than 1000, then the referral will get 10% of billed amount only. Is there any module already built for this or if someone can help implement this?