title: MDX show all sales until now
body: <p>i have a huge table of cashflows that means there are +int values for income and -int values for outcome.</p>
  
  <p>I have MeasureGroup for Sum the amount of money.</p>
  
  <p>I now want to display not only the sum of money per month but also the sum of all the past time until the current month so like that:</p>
  
  <pre><code>Month  MoneyAmount  Total
  1      20           20
  2      -10          10
  3      5            15
  4     -10           5
  </code></pre>
  
  <p>So i know for the first part its just like</p>
  
  <pre><code>select [Measures].[Money] on 0,
  [Date].[Month].Members on 1
  From MyCube
  </code></pre>
  
  <p>but how can i add the sum column?</p>
  
  <p>i thought about something like SUM(  { NULL : [Date].[Month].CurrentMember } , [Measures].[Money] ) but that didnt work as well :(</p>