MDX: Filtering and slicing on different members of the same dimension

I am using icCube's Sales cube to learn MDX. I would like to write an MDX query to show the revenue from sales in 2009 for those countries where the revenue from sales in 2010 was over $80,000. I tried the following, but it returned an empty table with only one column ([Amount]):

WITH
 SET [myset] AS Filter([Country].members, ([Measures].[Amount], [2010])>80000)
select [Country].members on 0, [Amount] on 1
from (select [myset] on 0, [Amount] on 1 from [sales])
where [2009]