How do I adjust affiliate commission for an individual product using Marketpress & Affiliates Pl

I have a primary service that costs $297. I would like to offer a flat $25 affiliate commission for that “product”. There are also “Upsell” products which I offer a higher commission on (50%). They cost respectively $50, $100, $300 and the commissions would be $25, $50, and $150 for each.

Is that set-up possible with your plugins? Thank you.