title: How to I get cumulative monthly subtotals in SSRS?
body: <p>I'm using SSRS to create a report which shows a lot of transactions according to a trade date. I've made a group on the month and year called <strong>'grpMonthYear'</strong>. Inside that group I've made a subgroup on 'TradeDate'.</p>
  
  <p>The groups and all work perfectly. I'm also generating monthly subtotals in the footer of the group 'grpMonthYear'.</p>
  
  <p>But now I want the cumulative subtotals.</p>
  
  <p>Example, if Jan'13 totaled up to $5,000.00 and transactions in Feb'13 totaled up to $7,000.00 So the monthly subtotal in Feb'13 should show me $12,000.00</p>
  
  <p>I tried using </p>
  
  <pre><code>RunningValue(Fieldname,SUM,'grpMonthYear')
  </code></pre>
  
  <p>But it doesn't work. </p>
  
  <p>Am I missing out something?</p>