app/controllers/documents_controller.php

@@ -260,6 +260,9 @@ class DocumentsController extends AppController {
 			if(isset($source_document_id)) {
 				//This is not ideal. But nothing else is either.
 				$sourceDoc = $this->Document->find('first', array('conditions' => array('Document.id' => $source_document_id)));
+
+				$totals = $this->calculateTotals($sourceDoc, $enquiry['Enquiry']['gst']);
+				$this->data['Invoice']['amount_invoiced'] = $totals['total'];
 				if($sourceDoc['Document']['type'] == 'orderAck') {
 					$oa_attributes = array(
 						'ship_via',