yep, I get what your saying.
And its coming. I have some ideas to make it auto detect the dp. Basically if you mark off credits used, it will take out the price of the food included. It will take a bunch of coding but I will get it done.
For now, if you know its going to be OOP for a meal, just enter the costs into a section that you know is never included in the dp. Like the premium drinks section.
I know its not very user friendly at the moment.