Inside the chapter 13 of the CSA v8 course, for the :
Create the Invoice total property calculated as the sum of the items in the Selected services field group
I don't have the same Calculation modal dialog, and I'm a bit lost because in my calculation modal dialog I have only one field to enter a formula. I'm wondering if I made a mistake in a previous step of the exercice or something else.
***Edited by Moderator Marissa to move from Pega Support Community to Pega Academy***
After looking into the Chapter 13 of the CSA course came to know that we are trying to calculate the sum of all the Line total property values into the Invoice total field. So you should add a Invoice total field using Add field link which will add this property in the parent hierarchy, but in your case you added the Invoice total field using Add field to selected services link which added this field into Selected Services field group hierarchy. This is the reason why you are not able to calculate the sum of all the Line total items as your Invoice total is in selected services hierarchy.
So remove the Invoice total field from Selected services and add it using Add field link to resolve your issue.