title: MDX - Visual totals on user hierarchy
body: <p>I'd like to have a visual total on a user hierarchy in MDX</p>
  
  <p>That's to say :
  I've got a team T1, 
  with people P1,P2,P3.
  Each of these people has got a yearly objective O1,O2,O3</p>
  
  <p>at certain date in this year, only P2 has worked.
  By filtering the people on a other measure called "Profit Potential".</p>
  
  <p>I see  </p>
  
  <pre><code>Team Hierachy | Objective
  --------------+-------------
  "T1 - (all)"  |  O1 + O2 +O3
  "T1 - P2 "    |  O2
  "T2 - (all)   |  O4
  (snip)        | (snap)
  </code></pre>
  
  <p>Since P1 and P3 wind up not involved at all, what I want to achieve is</p>
  
  <pre><code>Team Hierachy | Objective
  --------------+-------------
  "T1 - (all)"  |  O2 
  "T1 - P2 "    |  O2
  "T2 - (all)   |  O4
  (snip)        | (snap)
  </code></pre>
  
  <p>Thanks in advance.</p>