I want to write a calculated measure to achieve the below results:
My cibe has three dimensions. Product, Time and Measures

Three measures: Base, Adjs, Comp
Base and Adjs are fact table measures. Comp is a calculated member.

Suppose the user selects 2001, 2002, 2003 on either rows or columns.
Example:

2001 2002 2003
Base 10 15 20
Adjs 5 8 9
Comp 10/9 15/9 20/9


And if the user selects:

1997 2000 2002
Base 60 35 25
Adjs 8 7 8
Comp 60/8 35/8 25/8


And even if the users select Products and Measures on roes and
columns, but slice it by Time:

Base Adjs Comp
Prod1 9 5 9/5
Prod6 7 5 7/5


Slice by Time: {1999, 2001}

If you follow:

I want the CALCULATED MEMBER "Comp" to be always based on Adjs value
of Highest Year in the selections.

Can you please help? I don't know how to refer to an item from current
selection.