title: Paypal express checkout error Order total is missing. Error 10400
body: <p>i have problem, i`m trying to send multiple items to Paypal but it shows "Order total is missing." - 10400 error</p>
  
  <p>Version: 76.0<br />
  I`m testing on paypal sandbox<br /><br />
  My request:</p>
  
  <pre><code>&amp;AMT=106.72
  &amp;RETURNURL=http%3A%2F%mydomainname.com%2Fpp%2Fpaypal%2Fprocess.php
  &amp;CANCELURL=http%3A%2F%mydomainname.com%2Fpp%2Fpaypal%2Fcancel_url.php
  &amp;L_PAYMENTREQUEST_0_QTY0=3
  &amp;L_PAYMENTREQUEST_0_AMT0=28.46
  &amp;L_PAYMENTREQUEST_0_NAME0=FIRSTitem
  &amp;L_PAYMENTREQUEST_0_NUMBER0=0
  &amp;L_PAYMENTREQUEST_0_QTY1=1
  &amp;L_PAYMENTREQUEST_0_AMT1=21.34
  &amp;L_PAYMENTREQUEST_0_NAME1=SECONDitem
  &amp;L_PAYMENTREQUEST_0_NUMBER1=1
  &amp;CURRENCYCODE=EUR 
  &amp;PAYMENTACTION=Sale 
  &amp;ALLOWNOTE=1 
  &amp;PAYMENTREQUEST_0_CURRENCYCODE=EUR
  &amp;PAYMENTREQUEST_0_AMT=106.72
  &amp;PAYMENTREQUEST_0_ITEMAMT=106.72
  </code></pre>
  
  <p>Response:</p>
  
  <pre><code>Array
  (
      [TIMESTAMP] =&gt; 2013%2d04%2d30T06%3a27%3a40Z
      [CORRELATIONID] =&gt; f1eae8919df21
      [ACK] =&gt; Failure
      [VERSION] =&gt; 76%2e0
      [BUILD] =&gt; 5817241
      [L_ERRORCODE0] =&gt; 10400
      [L_SHORTMESSAGE0] =&gt; Transaction%20refused%20because%20of%20an%20invalid%20argument%2e%20See%20additional%20error%20messages%20for%20details%2e
      [L_LONGMESSAGE0] =&gt; Order%20total%20is%20missing%2e
      [L_SEVERITYCODE0] =&gt; Error
  )
  </code></pre>
  
  <p><br />
  I've tried to:
  <br /></p>
  
  <ol>
  <li>Change servers - server is not the problem.<br /></li>
  <li>Took out <code>&amp;AMT=</code> , then it still didnt work, so i took
  <code>&amp;PAYMENTREQUEST_0_AMT=</code> out and left <code>&amp;AMT=</code> in... but still didnt
  work.. now there are both of them.<br /></li>
  </ol>
  
  <p>Thanks!</p>