Sorry but i lost that Jhon Locke in the island !!!

[#1]

Helo and sorry but i cant write a expression with a calculated dimension and unknow the sintax,i intent with various sintax and nothing.

The dimension calculated is

= if(Año = 2012,'Actual','Anterior')

and i need sum a value of ventas based in the dimension

for example i write

sum({<año=>} ventas) and work but and that is the question

How i write the expression with the calculated dimension in the place of <año> ???

Thanks in advance.

[#2]

Nothing ???

any ideas ???