Maximum combined discount from shopper groups and coupon

[bogusj]

Hi,

I have a shopper group that gets 70% discount for all services.
I wanted to make a specific promotion, so I created a coupon that discounts 85 Euro, in order to set the selling price to 19 Euro, for a specific promotional period, only to the shoppers who know the coupon code.
The service price is 104 Euro. When I apply the coupon discount to a default shopper the price is set to 19 Euro, which is correct, since it's the maximum discount and final price I want to get.
However, when I apply it tothe 70% discount shopper, the price I get is 0.
Is there a way to have a maximum combined discount from shopper groups and coupons, so the minimum selling price is 19 Euro?

Thanks in advance.

[bogusj]

Hi,

Can anybody shed some light here please?