Can I change the discount on appointments from a % to a set amount of dollars?

I see there is a way to give members registered via membership a discount in appointments.
But I want ppl who have a membership to only pay $10 for all appointment deposits.
Regular non members pay a percentage based on the total price of the service.
But I want members who pay a monthly fee for membership to only pay $10 regardless of how much the service is.

Any suggestions?