Named set for last 12 months based on date from filter

Hi,

I have a scenario where I need to create a report in Excel 2013 based on SSAS cube. The report should show measureX(let's call it sales amount) for last 12 months(not in total but by every month) based on month from filter. So if I select 2015-02, the set would list all the months from 2014-03 to 2015-02 with their respective sales(X). What is the best approach here? If it's not possible to filter the dynamic set in this way, is there some workaround?

Thanks.