1) Country Sales/ FTE - I am guessing: aggr(sum(Sales)/sum(FTE),Country)
2) Regions Sales/ FTE 25% Quartile - which needs to remain at Region level when one country is selected
Do you envision them in a chart or a KPI object? I would think chart because you seem to want the 1st one per country, right? 2nd one seems to be per region, so region and country (maybe?) as dimension?