Even though we are not huge fans of the methodology of a constant sum, we were pretty much forced into its questfox integration.
The constant sum question is checking a list of items for a sum which can be set at a defined value or range. questfox now automatically checks, whether the defined sum is reached.
You will find this new question type under NUMBER
The first version is already integrated into questfox
Please allow us to develop the awesome version of a graphical data input of the contant sum inside of questfox (perhaps we will become friends again with the very unliked constant sum)