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I need to calculate actaul variance  and net variance by slected 2 dates from slicer for eg(base date = 1/1/2019 and coampare date = 6/1/2019 actual variance =1 and net =2 but for base date = 6/1/2019 and copare date 1/1/2019 actaul variance =0 and net variance =2)