diff --git a/addons/purchase/report/purchase_report.py b/addons/purchase/report/purchase_report.py
index c3becb03721..26aea227351 100644
--- a/addons/purchase/report/purchase_report.py
+++ b/addons/purchase/report/purchase_report.py
@@ -96,10 +96,10 @@ class purchase_report(osv.osv):
                     extract(epoch from age(s.date_approve,s.date_order))/(24*60*60)::decimal(16,2) as delay,
                     extract(epoch from age(l.date_planned,s.date_order))/(24*60*60)::decimal(16,2) as delay_pass,
                     count(*) as nbr,
-                    sum(l.price_unit*cr.rate*l.product_qty)::decimal(16,2) as price_total,
-                    avg(100.0 * (l.price_unit*cr.rate*l.product_qty) / NULLIF(ip.value_float*l.product_qty/u.factor*u2.factor, 0.0))::decimal(16,2) as negociation,
+                    sum(l.price_unit/cr.rate*l.product_qty)::decimal(16,2) as price_total,
+                    avg(100.0 * (l.price_unit/cr.rate*l.product_qty) / NULLIF(ip.value_float*l.product_qty/u.factor*u2.factor, 0.0))::decimal(16,2) as negociation,
                     sum(ip.value_float*l.product_qty/u.factor*u2.factor)::decimal(16,2) as price_standard,
-                    (sum(l.product_qty*cr.rate*l.price_unit)/NULLIF(sum(l.product_qty/u.factor*u2.factor),0.0))::decimal(16,2) as price_average
+                    (sum(l.product_qty*l.price_unit/cr.rate)/NULLIF(sum(l.product_qty/u.factor*u2.factor),0.0))::decimal(16,2) as price_average
                 from purchase_order_line l
                     join purchase_order s on (l.order_id=s.id)
                         left join product_product p on (l.product_id=p.id)