title: SSRS report grouping (AX 2012)
body: <p>I'm modifying the sales invoice report.
  What I want to do is to group lines by LineHeader. 
  i.e. if invoice has 6 lines and 3 salesid, report should be like:</p>
  
  <p>LineHeader {2 lines below}, LineHeader {2 lines below}, LineHeader {2 lines below}.</p>
  
  <p>How to group to achieve it?</p>