Hi @MikeS ,
The reason your formula doesn’t work is because you are using the issue property (Issue Hours spent), instead, you should use “Hours spent” and it will interact with the Time dimension as well.
Make sure you use the Epic Country custom field instead of your original “Country” field to be able to filter your results. The “Epic Country” field import is described here (Filtered Epics + Child issues + Sub-tasks Hours)
Best wishes,
Elita from support@eazybi.com