[FIX] product_extended: workcenter cost

- Create a work center with a capacity of 1, an efficiency factor of
  100% and a cost per hour of 40$
- Create a routing with two operations: one with a fixed duration of
  30:00 minutes (OP1) and another with a duration computed on real time
  but with a default of 30:00 minutes (OP2)
- Create a component with UOM "m" and a cost of 10$
- Create a finished product with an associated BoM
- The BoM has a first line with 0.8m of component in the OP1 and a
  second line with 0.4m of component in the OP2
- Activate the Compute from BoM option on the finished product
- The proposed cost is 32$

Expected cost: 52$
(30 minutes @40$/hour + 30 minutes @40$/hour + 1,2m @10$/m)

We divide the WC cost by the number of operations, which does not make
sense.

opw-741032

addons/product_extended/models/product.py

@@ -35,7 +35,6 @@ class ProductProduct(models.Model):
 
     def _calc_price(self, bom):
         price = 0.0
-        workcenter_cost = 0.0
         result, result2 = bom.explode(self, 1)
         for sbom, sbom_data in result2:
             if not sbom.attribute_value_ids:
@@ -45,8 +44,7 @@ class ProductProduct(models.Model):
             total_cost = 0.0
             for order in bom.routing_id.operation_ids:
                 total_cost += (order.time_cycle_manual/60) * order.workcenter_id.costs_hour
-            workcenter_cost = total_cost / len(bom.routing_id.operation_ids)
-            price += bom.product_uom_id._compute_price(workcenter_cost, bom.product_id.uom_id)
+            price += bom.product_uom_id._compute_price(total_cost, bom.product_id.uom_id)
         # Convert on product UoM quantities
         if price > 0:
             price = bom.product_uom_id._compute_price(price / bom.product_qty, self.uom_id)