diff --git a/app/db_mgr.py b/app/db_mgr.py
index d4a2b6d..d2a1445 100644
--- a/app/db_mgr.py
+++ b/app/db_mgr.py
@@ -107,7 +107,7 @@ def charges_by_project_stacked(project_id, category="service"):
         raise ValueError("Waiting for 'service' or 'capacity'")
     categories_req = "select name from {} order by id".format(category_table)
     categories = [c for (c,) in db.session.execute(categories_req)]
-    headers = ['period']+categories
+    headers = ['period'] + categories
     all_charges = [headers]
     for (period_id, period_name) in db.session.execute("select id, name from period order by id"):
         # build the request from the string previously set
@@ -122,6 +122,34 @@ def charges_by_project_stacked(project_id, category="service"):
     return all_charges
 
 
+def charges_by_agent_stacked(agent_id):
+    """
+    Build the list of charges for all projects of one agent, period by period
+    :param agent_id:
+    :return:
+    """
+    categories_req = "select name from project order by id"
+    categories = [c for (c,) in db.session.execute(categories_req)]
+    headers = ['period'] + categories
+    all_charges = [headers]
+    for (period_id, period_name) in db.session.execute("select id, name from period order by id"):
+        charge_by_project_req = """
+                               select sum(c.charge_rate)
+                                from project p
+                                         left join
+                                     charge c on p.id = c.project_id and agent_id = {} and period_id = {}
+                                group by p.id
+                                order by p.id 
+                            """.format(agent_id, period_id)
+        print(charge_by_project_req)
+        category_charges = [period_name]
+        for (category_rate,) in db.session.execute(charge_by_project_req):
+            category_rate = str(category_rate) if category_rate else '0'
+            category_charges.append(category_rate)
+        all_charges.append(category_charges)
+    return all_charges
+
+
 def charges_by_agent_tabled(agent_id):
     """
     Build the flatten list of charges for one agent, period by period
@@ -155,24 +183,6 @@ def charges_by_agent_tabled(agent_id):
     return nocomma_results
 
 
-def charges_by_agent_stacked(agent_id):
-    """
-    Build the list of charges for one agent, period by period
-    :param agent_id:
-    :return:
-    """
-    all_charges = {}
-    for (period_id, period_name) in db.session.execute("select id, name from period order by id"):
-        charge_by_project_req = """select  p.name, c.charge_rate from project p left join
-                                    charge c on p.id = c.project_id and agent_id = {} and period_id={}
-                                        order by p.id""".format(agent_id, period_id)
-        period_charge = {}
-        for project_name, project_rate in db.session.execute(charge_by_project_req):
-            period_charge[project_name] = project_rate
-        all_charges[period_name] = period_charge
-    return all_charges
-
-
 def charges_by_agent(agent_id):
     periods = db.session.execute("select name from period")
     sql_txt = "select p.name, sum(charge_rate)  from charge inner join period p on charge.period_id = p.id\
diff --git a/tests/backend_tests.py b/tests/backend_tests.py
index 595051c..8d64c79 100644
--- a/tests/backend_tests.py
+++ b/tests/backend_tests.py
@@ -1,4 +1,5 @@
 import unittest
+
 from pdc_config import TestConfig
 from app import create_app, db_mgr, db
 from app.auth.models import User
@@ -11,10 +12,10 @@ class BaseTestCase(unittest.TestCase):
         self.app_context = self.app.app_context()
         self.app_context.push()
         # TODO: shall we always copy db from resources ?
-        #db.create_all()
-        #admin = User(email='admin@nowhere.org', name='admin', login='admin', password='admin', role='admin')
-        #db.session.add(admin)
-        #db.session.commit()
+        # db.create_all()
+        # admin = User(email='admin@nowhere.org', name='admin', login='admin', password='admin', role='admin')
+        # db.session.add(admin)
+        # db.session.commit()
 
     def tearDown(self):
         self.app_context.pop()
@@ -34,6 +35,16 @@ class DbMgrTestCase(BaseTestCase):
         all_charges = db_mgr.charges_by_agent(355)
         self.assertEqual(17, len(all_charges))
 
+    def test_charges_by_agent_stacked(self):
+        stacked_charges = db_mgr.charges_by_agent_stacked(60)
+        # Waiting for 17 periods + headers line
+        self.assertEqual(18, len(stacked_charges))
+
+    def test_charges_by_project_stacked(self):
+        stacked_charges = db_mgr.charges_by_project_stacked(60)
+        # Waiting for 17 periods + headers line
+        self.assertEqual(18, len(stacked_charges))
+
 
 class AuthModelTestCase(BaseTestCase):
 
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