diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.js b/erpnext/accounts/doctype/sales_invoice/sales_invoice.js
index 4cd66f532f..5609fcecac 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.js
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.js
@@ -503,9 +503,23 @@ frappe.ui.form.on('Sales Invoice Timesheet', {
 						frappe.model.set_value(cdt, cdn, "billing_hours", data.billing_hours);
 						frappe.model.set_value(cdt, cdn, "billing_amount", data.billing_amount);
 						frappe.model.set_value(cdt, cdn, "timesheet_detail", data.timesheet_detail);
+						calculate_total_billing_amount(frm)
 					}
 				}
 			})
 		}
 	}
 })
+
+var calculate_total_billing_amount =  function(frm) {
+	var doc = frm.doc;
+
+	doc.total_billing_amount = 0.0
+	if(doc.timesheets) {
+		$.each(doc.timesheets, function(index, data){
+			doc.total_billing_amount += data.billing_amount
+		})
+	}
+
+	refresh_field('total_billing_amount')
+}
diff --git a/erpnext/projects/doctype/timesheet/timesheet.json b/erpnext/projects/doctype/timesheet/timesheet.json
index 160e3b7fe4..5d9fe94601 100644
--- a/erpnext/projects/doctype/timesheet/timesheet.json
+++ b/erpnext/projects/doctype/timesheet/timesheet.json
@@ -6,7 +6,7 @@
  "beta": 0, 
  "creation": "2013-02-28 17:57:33", 
  "custom": 0, 
- "description": "Batch Time Logs for Billing.", 
+ "description": "", 
  "docstatus": 0, 
  "doctype": "DocType", 
  "document_type": "Document", 
@@ -213,7 +213,7 @@
    "collapsible": 0, 
    "columns": 0, 
    "depends_on": "", 
-   "description": "List of employee which has \"Salary Slip Based on Timesheet\" is enabled in salary structure.", 
+   "description": "", 
    "fieldname": "employee", 
    "fieldtype": "Link", 
    "hidden": 0, 
@@ -847,7 +847,7 @@
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 0, 
- "modified": "2016-11-04 18:27:08.484033", 
+ "modified": "2016-11-23 17:35:51.194690", 
  "modified_by": "Administrator", 
  "module": "Projects", 
  "name": "Timesheet",