diff --git a/erpnext/projects/doctype/project/project.json b/erpnext/projects/doctype/project/project.json
index dbdffdf..e809328 100644
--- a/erpnext/projects/doctype/project/project.json
+++ b/erpnext/projects/doctype/project/project.json
@@ -1027,6 +1027,35 @@
   {
    "allow_on_submit": 0, 
    "bold": 0, 
+   "collapsible": 0, 
+   "columns": 0, 
+   "fieldname": "total_sales_cost", 
+   "fieldtype": "Currency", 
+   "hidden": 0, 
+   "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
+   "in_filter": 0, 
+   "in_global_search": 0, 
+   "in_list_view": 0, 
+   "in_standard_filter": 0, 
+   "label": "Total Sales Cost (via Sales Order)", 
+   "length": 0, 
+   "no_copy": 0, 
+   "permlevel": 0, 
+   "precision": "", 
+   "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
+   "read_only": 1, 
+   "remember_last_selected_value": 0, 
+   "report_hide": 0, 
+   "reqd": 0, 
+   "search_index": 0, 
+   "set_only_once": 0, 
+   "unique": 0
+  },   
+  {
+   "allow_on_submit": 0, 
+   "bold": 0, 
    "collapsible": 1, 
    "columns": 0, 
    "fieldname": "margin", 
@@ -1232,4 +1261,4 @@
  "timeline_field": "customer", 
  "track_changes": 0, 
  "track_seen": 1
-}
\ No newline at end of file
+}
diff --git a/erpnext/projects/doctype/project/project.py b/erpnext/projects/doctype/project/project.py
index b5ef4bf..289b7dd 100644
--- a/erpnext/projects/doctype/project/project.py
+++ b/erpnext/projects/doctype/project/project.py
@@ -176,6 +176,13 @@
 			from `tabPurchase Invoice Item` where project = %s and docstatus=1""", self.name)
 
 		self.total_purchase_cost = total_purchase_cost and total_purchase_cost[0][0] or 0
+		
+	def update_sales_costing(self):
+		total_sales_cost = frappe.db.sql("""select sum(grand_total)
+			from `tabSales Order` where project = %s and docstatus=1""", self.name)
+
+		self.total_sales_cost = total_sales_cost and total_sales_cost[0][0] or 0
+				
 
 	def send_welcome_email(self):
 		url = get_url("/project/?name={0}".format(self.name))
diff --git a/erpnext/selling/doctype/sales_order/sales_order.py b/erpnext/selling/doctype/sales_order/sales_order.py
index fdaadd8..7c5fb04 100644
--- a/erpnext/selling/doctype/sales_order/sales_order.py
+++ b/erpnext/selling/doctype/sales_order/sales_order.py
@@ -157,7 +157,7 @@
 		self.update_reserved_qty()
 
 		frappe.get_doc('Authorization Control').validate_approving_authority(self.doctype, self.company, self.base_grand_total, self)
-
+		self.update_project()
 		self.update_prevdoc_status('submit')
 
 	def on_cancel(self):
@@ -167,10 +167,19 @@
 
 		self.check_nextdoc_docstatus()
 		self.update_reserved_qty()
-
+		self.update_project()
 		self.update_prevdoc_status('cancel')
 
 		frappe.db.set(self, 'status', 'Cancelled')
+		
+	def update_project(self):
+		project_list = []
+		if self.project:
+				project = frappe.get_doc("Project", self.project)
+				project.flags.dont_sync_tasks = True
+				project.update_sales_costing()
+				project.save()
+				project_list.append(self.project)				
 
 	def check_credit_limit(self):
 		from erpnext.selling.doctype.customer.customer import check_credit_limit