title: Two header with own line item in one display
body: <p>I got a request from user to develop a report that show the invoice detail in one display. </p>
  
  <p>All I found was how to show two different tables in the same page.</p>
  
  <p>Is there a way to show it in the same table but with two header?</p>
  
  <p>It's something like this.</p>
  
  <blockquote>
    <p>HD    Billing Doc.    Doc. Currency   Sales Org   Distr. Channel  Billing Date </p>
    
    <p>IT    Item    Billed qty  Sales unit  Net weight  Net value</p>
    
    <p>HD    900230006   USD JH01    01  05.01.2014</p>
    
    <p>IT    10  60  KG  60  1000</p>
    
    <p>IT    20  20  BAG 20  4000</p>
    
    <p>HD    900230007   EUR JH01    01  05.01.2014</p>
    
    <p>IT    10  22  KG  22  990</p>
    
    <p>IT    20  67  BAG 67  456</p>
    
    <p>IT    30  15  KG  15  897</p>
  </blockquote>