title: Calculations within the text control that are in the new repeat control
body: <p>I am developing an eform in Orbeon form builder. Here I am using a repeater (new repeat) control. Within that control there are many rows of text controls. I want to make some calculation with the values which the user will insert in those controls. Suppose two columns are there "number of items" and "Unite price". Inside which there are many rows, i.e. user will insert values dynamically.</p>
  
  <p>Next to this repeater control is a text control where the total amount must be displayed without any button event.</p>
  
  <p>E.g. suppose a repeater structure which is like a table:</p>
  
  <pre><code>column name(Number of items---unit price)
   first value(1 ----100)
   second value(5----200)
  </code></pre>
  
  <p>Total amount must be displayed on the text control as 1100. The number of grid may increase depending upon the user (here it is 2).</p>