title: “Decrease” the measure in OLAP Cube
body: <p>I have an OLAP Cube in which  there is a Parent-Child Account Dimension.
  My goal is to set a certain measure value on the GROSS-PROFIT Account , with a certain logic : 
  GROSS PROFIT = REVENUES - COSTS </p>
  
  <p>GROSS PROFIT is the parent of REVENUES and COSTS in my account hierarchy, and now the measure shows me the sum (obviously) , not the substraction. </p>
  
  <p>The measure is named [Measures].[Report] 
  I don’t know how to return, in my measure, the substraction only for the GROSS PROFIT Account , so please help me. </p>
  
  <p>Tks a lot </p>
  
  <p>Daniel </p>