As a Product Manager I want to see the sum of the values of child issues custom fields in JIRA Portfolio Scope Grid so that I could have more information about Initiatives.

This is very important for us, since other native fields already have this (Story Points for example). We added budget custom field and we want to see the sum of it on Portfolio.

For example: Epics have a budget field, and we want to see the sum of it on the Initiative and other top Hierarchy issues. The same thing that happens to Story Point field for example.