diff --git a/erpnext/shopping_cart/doctype/shopping_cart_settings/shopping_cart_settings.py b/erpnext/shopping_cart/doctype/shopping_cart_settings/shopping_cart_settings.py
index c206ba2..6915ef5 100644
--- a/erpnext/shopping_cart/doctype/shopping_cart_settings/shopping_cart_settings.py
+++ b/erpnext/shopping_cart/doctype/shopping_cart_settings/shopping_cart_settings.py
@@ -13,76 +13,76 @@
 class ShoppingCartSetupError(frappe.ValidationError): pass
 
 class ShoppingCartSettings(Document):
-    def onload(self):
-        self.get("__onload").quotation_series = frappe.get_meta("Quotation").get_options("naming_series")
+	def onload(self):
+		self.get("__onload").quotation_series = frappe.get_meta("Quotation").get_options("naming_series")
 
-    def validate(self):
-        if self.enabled:
-            self.validate_exchange_rates_exist()
+	def validate(self):
+		if self.enabled:
+			self.validate_exchange_rates_exist()
 
-    def validate_exchange_rates_exist(self):
-        """check if exchange rates exist for all Price List currencies (to company's currency)"""
-        company_currency = frappe.db.get_value("Company", self.company, "default_currency")
-        if not company_currency:
-            msgprint(_("Please specify currency in Company") + ": " + self.company,
-                raise_exception=ShoppingCartSetupError)
+	def validate_exchange_rates_exist(self):
+		"""check if exchange rates exist for all Price List currencies (to company's currency)"""
+		company_currency = frappe.db.get_value("Company", self.company, "default_currency")
+		if not company_currency:
+			msgprint(_("Please specify currency in Company") + ": " + self.company,
+				raise_exception=ShoppingCartSetupError)
 
-        price_list_currency_map = frappe.db.get_values("Price List",
-            [self.price_list],
-            "currency")
+		price_list_currency_map = frappe.db.get_values("Price List",
+			[self.price_list],
+			"currency")
 
-        # check if all price lists have a currency
-        for price_list, currency in price_list_currency_map.items():
-            if not currency:
-                frappe.throw(_("Currency is required for Price List {0}").format(price_list))
+		# check if all price lists have a currency
+		for price_list, currency in price_list_currency_map.items():
+			if not currency:
+				frappe.throw(_("Currency is required for Price List {0}").format(price_list))
 
-        expected_to_exist = [currency + "-" + company_currency
-            for currency in price_list_currency_map.values()
-            if currency != company_currency]
-        
-        # manqala 20/09/2016: set up selection parameters for query from tabCurrency Exchange    
-        from_currency = [currency for currency in price_list_currency_map.values() if currency != company_currency]
-        to_currency = company_currency
-        # manqala end
+		expected_to_exist = [currency + "-" + company_currency
+			for currency in price_list_currency_map.values()
+			if currency != company_currency]
+		
+		# manqala 20/09/2016: set up selection parameters for query from tabCurrency Exchange	
+		from_currency = [currency for currency in price_list_currency_map.values() if currency != company_currency]
+		to_currency = company_currency
+		# manqala end
 
-        if expected_to_exist:
-            # manqala 20/09/2016: modify query so that it uses date in the selection from Currency Exchange.
-            # exchange rates defined with date less than the date on which this document is being saved will be selected
-            exists = frappe.db.sql_list("""select CONCAT(from_currency,'-',to_currency) from `tabCurrency Exchange`
-                where from_currency in (%s) and to_currency = "%s" and date <= curdate()""" % (", ".join(["%s"]*len(from_currency)), to_currency), tuple(from_currency))
-            # manqala end
+		if expected_to_exist:
+			# manqala 20/09/2016: modify query so that it uses date in the selection from Currency Exchange.
+			# exchange rates defined with date less than the date on which this document is being saved will be selected
+			exists = frappe.db.sql_list("""select CONCAT(from_currency,'-',to_currency) from `tabCurrency Exchange`
+				where from_currency in (%s) and to_currency = "%s" and date <= curdate()""" % (", ".join(["%s"]*len(from_currency)), to_currency), tuple(from_currency))
+			# manqala end
 
-            missing = list(set(expected_to_exist).difference(exists))
+			missing = list(set(expected_to_exist).difference(exists))
 
-            if missing:
-                msgprint(_("Missing Currency Exchange Rates for {0}").format(comma_and(missing)),
-                    raise_exception=ShoppingCartSetupError)
+			if missing:
+				msgprint(_("Missing Currency Exchange Rates for {0}").format(comma_and(missing)),
+					raise_exception=ShoppingCartSetupError)
 
-    def validate_tax_rule(self):
-        if not frappe.db.get_value("Tax Rule", {"use_for_shopping_cart" : 1}, "name"):
-            frappe.throw(frappe._("Set Tax Rule for shopping cart"), ShoppingCartSetupError)
+	def validate_tax_rule(self):
+		if not frappe.db.get_value("Tax Rule", {"use_for_shopping_cart" : 1}, "name"):
+			frappe.throw(frappe._("Set Tax Rule for shopping cart"), ShoppingCartSetupError)
 
-    def get_tax_master(self, billing_territory):
-        tax_master = self.get_name_from_territory(billing_territory, "sales_taxes_and_charges_masters",
-            "sales_taxes_and_charges_master")
-        return tax_master and tax_master[0] or None
+	def get_tax_master(self, billing_territory):
+		tax_master = self.get_name_from_territory(billing_territory, "sales_taxes_and_charges_masters",
+			"sales_taxes_and_charges_master")
+		return tax_master and tax_master[0] or None
 
-    def get_shipping_rules(self, shipping_territory):
-        return self.get_name_from_territory(shipping_territory, "shipping_rules", "shipping_rule")
+	def get_shipping_rules(self, shipping_territory):
+		return self.get_name_from_territory(shipping_territory, "shipping_rules", "shipping_rule")
 
 def validate_cart_settings(doc, method):
-    frappe.get_doc("Shopping Cart Settings", "Shopping Cart Settings").run_method("validate")
+	frappe.get_doc("Shopping Cart Settings", "Shopping Cart Settings").run_method("validate")
 
 def get_shopping_cart_settings():
-    if not getattr(frappe.local, "shopping_cart_settings", None):
-        frappe.local.shopping_cart_settings = frappe.get_doc("Shopping Cart Settings", "Shopping Cart Settings")
+	if not getattr(frappe.local, "shopping_cart_settings", None):
+		frappe.local.shopping_cart_settings = frappe.get_doc("Shopping Cart Settings", "Shopping Cart Settings")
 
-    return frappe.local.shopping_cart_settings
+	return frappe.local.shopping_cart_settings
 
 def is_cart_enabled():
-    return get_shopping_cart_settings().enabled
+	return get_shopping_cart_settings().enabled
 
 def check_shopping_cart_enabled():
-    if not get_shopping_cart_settings().enabled:
-        frappe.throw(_("You need to enable Shopping Cart"), ShoppingCartSetupError)
+	if not get_shopping_cart_settings().enabled:
+		frappe.throw(_("You need to enable Shopping Cart"), ShoppingCartSetupError)