diff --git a/src/ifcopenshell-python/ifcopenshell/api/cost/calculate_cost_item_resource_value.py b/src/ifcopenshell-python/ifcopenshell/api/cost/calculate_cost_item_resource_value.py
index edac53057a..3371d3e200 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/cost/calculate_cost_item_resource_value.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/cost/calculate_cost_item_resource_value.py
@@ -107,11 +107,10 @@ def calculate_cost_item_resource_value(file: ifcopenshell.file, cost_item: ifcop
             assert parent_cost
             cost, unit = parent_cost
         quantity = ifcopenshell.util.resource.get_quantity(resource)
-        if cost is None or quantity is None:
+        if cost is None:
             continue
         if unit and "day" in unit:
             quantity = quantity / 8  # Assume 8 hour working day - TODO implement resource calendar
-        quantity = round(quantity, 5)
         formula = "{}*{}".format(cost, quantity)
         cost_value = ifcopenshell.api.cost.add_cost_value(file, parent=settings["cost_item"])
         cost_value.Name = resource.Name