sumUp for Jira Cloud can now be used within the issue navigator as a BETA feature to display sums.
Location
The feature can be accessed by clicking on the sumUp icon in the issue navigator:
Once clicked, the Filter Results (by sumUp) opens and shows the data that was selected in the originating issue navigator or JQL query. The gadget contains the columns configured in "My Defaults":
Configuration
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Use Cases and examples
If you still have questions, feel free to refer to our support team.