Pricing Markup Rates Based on Daily Price RANGE

I want to have the ability to modify markup rates per platform based on a RANGE of daily prices. For example, I may want to mark up VRBO 15% if my daily price is $75, but only mark up 10% if the daily price is $125. This matters to me because I want to keep the total price roughly the same between all my platforms and right now higher daily prices result in larger price discrepancies between all my linked platforms.