Cross Calulation - How to make comparison with value 12 month earlier.

Hello together,

I have a very specific question. We are using an account dimension and want to show the value for the current date and the date 12 month ago.

It is used here also a date dimension besides the account dimension which has the values. I was creating a cross calculation assigned to the date dimension in the following way:

Now when setting up the Values or Input Control I am struggling.

How to set up the last step for the cross calculation so the value 12 month ago is shown?

BR/