From d3ca729d4a52d96a80e33155d72c38e0644a4648 Mon Sep 17 00:00:00 2001
From: Remi <remi@le-filament.com>
Date: Wed, 4 Jul 2018 09:52:21 +0200
Subject: [PATCH] Invert calculation to get sale order amount - invoiced lines

---
 models/sale.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/models/sale.py b/models/sale.py
index 38a72f6..529d617 100644
--- a/models/sale.py
+++ b/models/sale.py
@@ -19,9 +19,9 @@ class SaleOrder(models.Model):
         for order in self:
             line_to_invoice = [line for line in order.order_line if line.invoice_status == 'to invoice']
 
-            untaxed_amount_to_invoice = 0.0
+            untaxed_amount_to_invoice = self.amount_untaxed 
             for line in line_to_invoice:
-                untaxed_amount_to_invoice += line.qty_to_invoice * line.price_unit
+                untaxed_amount_to_invoice -= line.qty_invoiced * line.price_unit
 
             order.update({
                 'untaxed_amount_to_invoice': untaxed_amount_to_invoice
-- 
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