How to get result from two calculated members comparision..?

Hi..,

      I created two calculated members., Name 1.Reference period and  2.analysis period..,  based on measure value.,

I am getting two set of results when i run them sepearatly..,

I need help regarding comparsion of customers..,

I need out put as 3 rd table but when i try to combine the members.., I get all are null values as 4th table.., for two date inputs., Please suggest me how to achieve this one.

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Thanks, Avula.GK