diff --git a/erpnext/projects/doctype/activity_cost/activity_cost.json b/erpnext/projects/doctype/activity_cost/activity_cost.json
index 0f37c5c..b44e310 100644
--- a/erpnext/projects/doctype/activity_cost/activity_cost.json
+++ b/erpnext/projects/doctype/activity_cost/activity_cost.json
@@ -100,13 +100,13 @@
    "allow_on_submit": 0, 
    "default": "0", 
    "description": "per hour", 
-   "fieldname": "internal_rate", 
+   "fieldname": "costing_rate", 
    "fieldtype": "Currency", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
    "in_filter": 0, 
    "in_list_view": 0, 
-   "label": "Internal Rate", 
+   "label": "Costing Rate", 
    "no_copy": 0, 
    "permlevel": 0, 
    "precision": "", 
@@ -135,7 +135,7 @@
  "is_submittable": 0, 
  "issingle": 0, 
  "istable": 0, 
- "modified": "2015-03-25 07:50:46.554655", 
+ "modified": "2015-04-01 02:06:37.510007", 
  "modified_by": "Administrator", 
  "module": "Projects", 
  "name": "Activity Cost", 
diff --git a/erpnext/projects/doctype/time_log/time_log.js b/erpnext/projects/doctype/time_log/time_log.js
index 6892d10..e1fa91b 100644
--- a/erpnext/projects/doctype/time_log/time_log.js
+++ b/erpnext/projects/doctype/time_log/time_log.js
@@ -45,7 +45,7 @@
 });
 
 var calculate_cost = function(doc) {
-	cur_frm.set_value("internal_cost", doc.internal_rate * doc.hours);
+	cur_frm.set_value("costing_amount", doc.costing_rate * doc.hours);
 	if (doc.billable==1){
 		cur_frm.set_value("billing_amount", doc.billing_rate * doc.hours);
 	}
@@ -60,7 +60,7 @@
 		},
 		callback: function(r) {
 			if(!r.exc) {
-				cur_frm.set_value("internal_rate", r.message.internal_rate);
+				cur_frm.set_value("costing_rate", r.message.costing_rate);
 				cur_frm.set_value("billing_rate", r.message.billing_rate);
 				calculate_cost(frm.doc);
 			}
diff --git a/erpnext/projects/doctype/time_log/time_log.json b/erpnext/projects/doctype/time_log/time_log.json
index f52bcad..92ae856 100644
--- a/erpnext/projects/doctype/time_log/time_log.json
+++ b/erpnext/projects/doctype/time_log/time_log.json
@@ -208,18 +208,18 @@
   {
    "default": "0", 
    "description": "per hour", 
-   "fieldname": "internal_rate", 
+   "fieldname": "costing_rate", 
    "fieldtype": "Currency", 
-   "label": "Internal Rate", 
+   "label": "Costing Rate", 
    "permlevel": 0, 
    "precision": "", 
    "read_only": 1
   }, 
   {
    "default": "0", 
-   "fieldname": "internal_cost", 
+   "fieldname": "costing_amount", 
    "fieldtype": "Currency", 
-   "label": "Internal Cost", 
+   "label": "Costing Amount", 
    "permlevel": 0, 
    "precision": "", 
    "read_only": 1
diff --git a/erpnext/projects/doctype/time_log/time_log.py b/erpnext/projects/doctype/time_log/time_log.py
index 1f70221..fc6ae53 100644
--- a/erpnext/projects/doctype/time_log/time_log.py
+++ b/erpnext/projects/doctype/time_log/time_log.py
@@ -217,9 +217,9 @@
 	
 	def validate_cost(self):
 		rate = get_activity_cost(self.employee, self.activity_type)
-		self.internal_rate = rate.get('internal_rate')
-		self.billing_rate = rate.get('billing_rate')
-		self.internal_cost = self.internal_rate * self.hours
+		self.costing_rate = rate.get('costing_rate') or 0
+		self.billing_rate = rate.get('billing_rate') or 0 
+		self.costing_amount = self.costing_rate * self.hours
 		if self.billable:
 			self.billing_amount = self.billing_rate * self.hours
 		else:
@@ -281,7 +281,7 @@
 	
 @frappe.whitelist()
 def get_activity_cost(employee=None, activity_type=None):
-	internal_rate = frappe.db.get_value("Activity Cost", {"employee":employee,"activity_type":activity_type}, "internal_rate")
+	costing_rate = frappe.db.get_value("Activity Cost", {"employee":employee,"activity_type":activity_type}, "costing_rate")
 	billing_rate = frappe.db.get_value("Activity Cost", {"employee":employee,"activity_type":activity_type}, "billing_rate")
-	return {"internal_rate": internal_rate, "billing_rate": billing_rate }
+	return {"costing_rate": costing_rate, "billing_rate": billing_rate }