diff --git a/rattail/app.py b/rattail/app.py
index f168797e08a92376413e11df9b975902cce9c8af..a674bae0f138e6792bd92a9ca93b84b5f2887fab 100644
--- a/rattail/app.py
+++ b/rattail/app.py
@@ -2,7 +2,7 @@
 ################################################################################
 #
 #  Rattail -- Retail Software Framework
-#  Copyright © 2010-2022 Lance Edgar
+#  Copyright © 2010-2023 Lance Edgar
 #
 #  This file is part of Rattail.
 #
@@ -29,6 +29,7 @@ from __future__ import unicode_literals, absolute_import
 import os
 # import re
 import datetime
+import decimal
 import os
 import shutil
 import socket
@@ -147,6 +148,26 @@ class AppHandler(object):
         from rattail.time import timezone
         return timezone(self.config, key)
 
+    def json_friendly(self, value):
+        """
+        Coerce a Python value to one which is JSON-serializable.
+
+        So, this does *not* return a JSON string, but rather a Python
+        object which can then be safely converted via
+        ``json.dumps()``.
+
+        If the value is a container, it will be crawled recursively
+        and all values it contains will be coerced.
+        """
+        if isinstance(value, dict):
+            for key, val in six.iteritems(value):
+                value[key] = self.json_friendly(val)
+
+        elif isinstance(value, decimal.Decimal):
+            value = float(value)
+
+        return value
+
     def localtime(self, *args, **kwargs):
         """
         Produce or convert a timestamp in the default time zone.
diff --git a/rattail/batch/custorder.py b/rattail/batch/custorder.py
index 9b48d38cbecb29cb8bd13e1f36e19ad26c9ec595..efd076be2519fa3250d33c0acec617d1e1d0d8ed 100644
--- a/rattail/batch/custorder.py
+++ b/rattail/batch/custorder.py
@@ -2,7 +2,7 @@
 ################################################################################
 #
 #  Rattail -- Retail Software Framework
-#  Copyright © 2010-2022 Lance Edgar
+#  Copyright © 2010-2023 Lance Edgar
 #
 #  This file is part of Rattail.
 #
@@ -57,6 +57,10 @@ class CustomerOrderBatchHandler(BatchHandler):
     has_custom_product_autocomplete = False
     nondigits_pattern = re.compile(r'\D')
 
+    def __init__(self, config, **kwargs):
+        super(CustomerOrderBatchHandler, self).__init__(config, **kwargs)
+        self.custorder_handler = self.app.get_custorder_handler()
+
     def init_batch(self, batch, progress=None, **kwargs):
         """
         Assign the "local" store to the batch, if applicable.
@@ -134,6 +138,15 @@ class CustomerOrderBatchHandler(BatchHandler):
                                    'allow_item_discounts',
                                    default=False)
 
+    def allow_item_discounts_if_on_sale(self):
+        """
+        Returns boolean indicating whether per-item discounts are
+        allowed when item is already on sale.
+        """
+        return self.config.getbool('rattail.custorders',
+                                   'allow_item_discounts_if_on_sale',
+                                   default=False)
+
     def allow_past_item_reorder(self):
         """
         Returns boolean indicating whether to expose past items for
@@ -518,6 +531,7 @@ class CustomerOrderBatchHandler(BatchHandler):
             'url': products.get_url(product),
             'image_url': products.get_image_url(product),
             'uom_choices': self.uom_choices_for_product(product),
+            'default_item_discount': self.get_default_item_discount(product),
         }
 
         # TODO: this was somewhat copied from
@@ -605,6 +619,14 @@ class CustomerOrderBatchHandler(BatchHandler):
            return that reason as a string; otherwise ``None``.
         """
 
+    def get_default_item_discount(self, product=None, **kwargs):
+        """
+        Returns default item discount available.  If product is given,
+        the default may be specific to its department etc.
+        """
+        return self.custorder_handler.get_default_item_discount(
+            product=product, **kwargs)
+
     def add_product(self, batch, product, order_quantity, order_uom,
                     **kwargs):
         """
diff --git a/rattail/custorders.py b/rattail/custorders.py
index 5ae059bf031f0ff304d89e78f58dbe3017259a4f..5b7befb695383a1e4604782a85a37e3715b23f0d 100644
--- a/rattail/custorders.py
+++ b/rattail/custorders.py
@@ -2,7 +2,7 @@
 ################################################################################
 #
 #  Rattail -- Retail Software Framework
-#  Copyright © 2010-2021 Lance Edgar
+#  Copyright © 2010-2023 Lance Edgar
 #
 #  This file is part of Rattail.
 #
@@ -28,6 +28,8 @@ Please note this is different from the Customer Order Batch Handler.
 
 from __future__ import unicode_literals, absolute_import
 
+import decimal
+
 from rattail.app import GenericHandler
 
 
@@ -36,6 +38,16 @@ class CustomerOrderHandler(GenericHandler):
     Base class and default implementation for customer order handlers.
     """
 
+    def get_default_item_discount(self, product=None, **kwargs):
+        """
+        Returns default item discount available.  If product is given,
+        the default may be specific to its department etc.
+        """
+        discount = self.config.get('rattail.custorders',
+                                   'default_item_discount')
+        if discount:
+            return decimal.Decimal(discount)
+
     def resolve_person(self, pending, person, user, **kwargs):
         """
         Resolve a pending person for all customer orders.