diff --git a/erpnext/patches.txt b/erpnext/patches.txt
index c0ad07f..d2e6adf 100644
--- a/erpnext/patches.txt
+++ b/erpnext/patches.txt
@@ -479,4 +479,5 @@
 erpnext.patches.v9_2.delete_process_payroll
 erpnext.patches.v10_0.add_agriculture_domain
 erpnext.patches.v10_0.add_non_profit_domain
-erpnext.patches.v10_0.setup_vat_for_uae_and_saudi_arabia
\ No newline at end of file
+erpnext.patches.v10_0.setup_vat_for_uae_and_saudi_arabia
+erpnext.patches.v10_0.copy_projects_renamed_fields
\ No newline at end of file
diff --git a/erpnext/patches/v10_0/copy_projects_renamed_fields.py b/erpnext/patches/v10_0/copy_projects_renamed_fields.py
new file mode 100644
index 0000000..58e32b0
--- /dev/null
+++ b/erpnext/patches/v10_0/copy_projects_renamed_fields.py
@@ -0,0 +1,12 @@
+import frappe
+from frappe.model.utils.rename_field import rename_field
+
+def execute():
+    """ copy data from old fields to new """
+    frappe.reload_doc("projects", "doctype", "project")
+
+    if frappe.db.has_column('Project', 'total_sales_cost'):
+        rename_field('Project', "total_sales_cost", "total_sales_amount")
+
+    if frappe.db.has_column('Project', 'total_billing_amount'):
+        rename_field('Project', "total_billing_amount", "total_billable_amount")
\ No newline at end of file
diff --git a/erpnext/patches/v8_0/update_sales_cost_in_project.py b/erpnext/patches/v8_0/update_sales_cost_in_project.py
index 4f89ba0..1a29fc4 100644
--- a/erpnext/patches/v8_0/update_sales_cost_in_project.py
+++ b/erpnext/patches/v8_0/update_sales_cost_in_project.py
@@ -2,8 +2,10 @@
 import frappe
 
 def execute():
+	frappe.reload_doc("projects", "doctype", "project")
+
 	frappe.db.sql("""
 		update `tabProject` p
-		set total_sales_cost = ifnull((select sum(base_grand_total)
+		set total_sales_amount = ifnull((select sum(base_grand_total)
 			from `tabSales Order` where project=p.name and docstatus=1), 0)
 	""")
\ No newline at end of file