Level 3 - User Story 1
Before i start the built, am I going into designing an UX, assuming Account is part of a hierarchy and it is the lowest level of the hierarchy? You want me to build an UX where the Regional Sales Executive should be able to report on the quarterly total for each account (User Story 1.3 and below) but before then he needs to be able to see data by Country. Can you give a little bit of background on - are County and Accounts part of the same hierarchy then?
In l3 there is a section on designing the User experience ie below; you will see the detailed UX pages required; you can upload your and compare yours with the examples provided.
I would would explore these then you can proceed to the actual builds.