diff --git a/accounts/doctype/journal_voucher/journal_voucher.py b/accounts/doctype/journal_voucher/journal_voucher.py
index 79ee19f..551b07d 100644
--- a/accounts/doctype/journal_voucher/journal_voucher.py
+++ b/accounts/doctype/journal_voucher/journal_voucher.py
@@ -237,11 +237,12 @@
 					self.doc.pay_to_recd_from = webnotes.conn.get_value(master_type, ' - '.join(d.account.split(' - ')[:-1]), master_type == 'Customer' and 'customer_name' or 'supplier_name')
 			
 			if acc_type == 'Bank or Cash':
-				dcc = get_company_currency(self.doc.company)
-				amt = cint(d.debit) and d.debit or d.credit	
-				self.doc.total_amount = dcc +' '+ cstr(amt)
-				self.doc.total_amount_in_words = get_obj('Sales Common').get_total_in_words(dcc, cstr(amt))
-
+				company_currency = get_company_currency(self.doc.company)
+				amt = flt(d.debit) and d.debit or d.credit	
+				self.doc.total_amount = company_currency +' '+ cstr(amt)
+				from webnotes.utils import money_in_words
+				self.doc.total_amount_in_words = money_in_words(amt, company_currency)
+				
 	def get_values(self):
 		cond = (flt(self.doc.write_off_amount) > 0) and ' and outstanding_amount <= '+self.doc.write_off_amount or ''
 		if self.doc.write_off_based_on == 'Accounts Receivable':
diff --git a/accounts/doctype/sales_invoice/sales_invoice.py b/accounts/doctype/sales_invoice/sales_invoice.py
index 2e48f91..60bf010 100644
--- a/accounts/doctype/sales_invoice/sales_invoice.py
+++ b/accounts/doctype/sales_invoice/sales_invoice.py
@@ -17,25 +17,21 @@
 from __future__ import unicode_literals
 import webnotes
 
-from webnotes.utils import add_days, cint, cstr, date_diff, flt, getTraceback, getdate, now, nowdate, sendmail, validate_email_add
-
+from webnotes.utils import add_days, cint, cstr, date_diff, flt, getdate, nowdate, sendmail
 from webnotes.utils import comma_and
-from webnotes import _
-from webnotes.model import db_exists
 from webnotes.model.doc import make_autoname
-from webnotes.model.wrapper import getlist, copy_doclist
+from webnotes.model.wrapper import getlist
 from webnotes.model.code import get_obj
-from webnotes import session, form, msgprint
-from setup.utils import get_company_currency
+from webnotes import _, msgprint
 
 session = webnotes.session
 
 month_map = {'Monthly': 1, 'Quarterly': 3, 'Half-yearly': 6, 'Yearly': 12}
 
 
-from utilities.transaction_base import TransactionBase
+from controllers.selling_controller import SellingController
 
-class DocType(TransactionBase):
+class DocType(SellingController):
 	def __init__(self,d,dl):
 		self.doc, self.doclist = d, dl
 		self.log = []
@@ -46,6 +42,8 @@
 		self.doc.name = make_autoname(self.doc.naming_series+ '.#####')
 		
 	def validate(self):
+		super(DocType, self).validate()
+		
 		self.so_dn_required()
 		self.validate_proj_cust()
 		sales_com_obj = get_obj('Sales Common')
@@ -70,7 +68,6 @@
 				self.validate_item_code()
 				self.update_current_stock()
 				self.validate_delivery_note()
-		self.set_in_words()
 		if not self.doc.is_opening:
 			self.doc.is_opening = 'No'
 		self.set_aging_date()
@@ -253,11 +250,14 @@
 			ret = get_obj('Sales Common').get_item_details(args, self)
 			return self.get_pos_details(args, ret)
 		else:
-			obj = get_obj('Sales Common')
 			for doc in self.doclist:
 				if doc.fields.get('item_code'):
-					arg = {'item_code':doc.fields.get('item_code'), 'income_account':doc.fields.get('income_account'), 
-						'cost_center': doc.fields.get('cost_center'), 'warehouse': doc.fields.get('warehouse')};
+					arg = {
+						'item_code':doc.fields.get('item_code'), 	
+						'income_account':doc.fields.get('income_account'), 
+						'cost_center': doc.fields.get('cost_center'), 
+						'warehouse': doc.fields.get('warehouse')
+					};
 
 					ret = self.get_pos_details(arg)
 					for r in ret:
@@ -411,13 +411,6 @@
 				msgprint("Please select income head with account type 'Fixed Asset Account' as Item %s is an asset item" % d.item_code)
 				raise Exception
 
-
-	def set_in_words(self):
-		dcc = get_company_currency(self.doc.company)
-		self.doc.in_words = get_obj('Sales Common').get_total_in_words(dcc, self.doc.rounded_total)
-		self.doc.in_words_export = get_obj('Sales Common').get_total_in_words(self.doc.currency, self.doc.rounded_total_export)
-
-
 	def clear_advances(self):
 		get_obj('GL Control').clear_advances(self, 'Sales Invoice Advance','advance_adjustment_details')
 
@@ -744,7 +737,7 @@
 				new_invoice_wrapper = make_new_invoice(ref_wrapper, next_date)
 				send_notification(new_invoice_wrapper)
 				webnotes.conn.commit()
-			except Exception, e:
+			except:
 				webnotes.conn.rollback()
 
 				webnotes.conn.begin()
diff --git a/controllers/selling_controller.py b/controllers/selling_controller.py
new file mode 100644
index 0000000..8dd1882
--- /dev/null
+++ b/controllers/selling_controller.py
@@ -0,0 +1,33 @@
+# ERPNext - web based ERP (http://erpnext.com)
+# Copyright (C) 2012 Web Notes Technologies Pvt Ltd
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from __future__ import unicode_literals
+import webnotes
+from setup.utils import get_company_currency
+
+from utilities.transaction_base import TransactionBase
+class SellingController(TransactionBase):
+	def validate(self):
+		self.set_total_in_words()
+		
+	def set_total_in_words(self):
+		from webnotes.utils import money_in_words
+		company_currency = get_company_currency(self.doc.company)
+		if self.meta.get_field("in_words"):
+			self.doc.in_words = money_in_words(self.doc.rounded_total, company_currency)
+		if self.meta.get_field("in_words_export"):
+			self.doc.in_words_export = money_in_words(self.doc.rounded_total_export,
+		 		self.doc.currency)
\ No newline at end of file
diff --git a/hr/doctype/salary_slip/salary_slip.py b/hr/doctype/salary_slip/salary_slip.py
index 651cc77..0f8e1ce 100644
--- a/hr/doctype/salary_slip/salary_slip.py
+++ b/hr/doctype/salary_slip/salary_slip.py
@@ -136,9 +136,10 @@
 
 
 	def validate(self):
+		from webnotes.utils import money_in_words
 		self.check_existing()
-		dcc = get_company_currency(self.doc.company)
-		self.doc.total_in_words	= get_obj('Sales Common').get_total_in_words(dcc, self.doc.rounded_total)
+		company_currency = get_company_currency(self.doc.company)
+		self.doc.total_in_words = money_in_words(self.doc.rounded_total, company_currency)
 
 
 	def calculate_earning_total(self):
diff --git a/selling/doctype/lead/lead.py b/selling/doctype/lead/lead.py
index dd24ff6..81c0d88 100644
--- a/selling/doctype/lead/lead.py
+++ b/selling/doctype/lead/lead.py
@@ -23,9 +23,9 @@
 
 sql = webnotes.conn.sql
 	
-from utilities.transaction_base import TransactionBase
+from controllers.selling_controller import SellingController
 
-class DocType(TransactionBase):
+class DocType(SellingController):
 	def __init__(self, doc, doclist):
 		self.doc = doc
 		self.doclist = doclist
diff --git a/selling/doctype/quotation/quotation.py b/selling/doctype/quotation/quotation.py
index 111b0b4..145bcb4 100644
--- a/selling/doctype/quotation/quotation.py
+++ b/selling/doctype/quotation/quotation.py
@@ -21,14 +21,13 @@
 from webnotes.model.wrapper import getlist
 from webnotes.model.code import get_obj
 from webnotes import msgprint
-from setup.utils import get_company_currency
 
 sql = webnotes.conn.sql
 	
 
-from utilities.transaction_base import TransactionBase
+from controllers.selling_controller import SellingController
 
-class DocType(TransactionBase):
+class DocType(SellingController):
 	def __init__(self, doc, doclist=[]):
 		self.doc = doc
 		self.doclist = doclist
@@ -172,12 +171,10 @@
 			else:
 				msgprint("Contact Date Cannot be before Last Contact Date")
 				raise Exception
-			#webnotes.conn.set(self.doc, 'contact_date_ref',self.doc.contact_date)
-	
 
-	# Validate
-	# --------
 	def validate(self):
+		super(DocType, self).validate()
+		
 		import utilities
 		utilities.validate_status(self.doc.status, ["Draft", "Submitted", 
 			"Order Confirmed", "Order Lost", "Cancelled"])
@@ -189,13 +186,9 @@
 		self.validate_for_items()
 		sales_com_obj = get_obj('Sales Common')
 		sales_com_obj.check_active_sales_items(self)
-		sales_com_obj.validate_max_discount(self,'quotation_details') #verify whether rate is not greater than max_discount
+		sales_com_obj.validate_max_discount(self,'quotation_details')
 		sales_com_obj.check_conversion_rate(self)
 		
-		# Get total in words
-		dcc = get_company_currency(self.doc.company)
-		self.doc.in_words = sales_com_obj.get_total_in_words(dcc, self.doc.rounded_total)
-		self.doc.in_words_export = sales_com_obj.get_total_in_words(self.doc.currency, self.doc.rounded_total_export)
 
 	def on_update(self):
 		# Set Quotation Status
diff --git a/selling/doctype/sales_common/sales_common.py b/selling/doctype/sales_common/sales_common.py
index b0b04bf..82acaa1 100644
--- a/selling/doctype/sales_common/sales_common.py
+++ b/selling/doctype/sales_common/sales_common.py
@@ -17,12 +17,11 @@
 from __future__ import unicode_literals
 import webnotes
 
-from webnotes.utils import add_days, cint, cstr, default_fields, flt, getdate, now, nowdate, formatdate
-from webnotes.model import db_exists
+from webnotes.utils import cint, cstr, flt, getdate, nowdate, formatdate
 from webnotes.model.doc import addchild
-from webnotes.model.wrapper import getlist, copy_doclist
+from webnotes.model.wrapper import getlist
 from webnotes.model.code import get_obj
-from webnotes import form, msgprint, _
+from webnotes import msgprint, _
 from setup.utils import get_company_currency
 
 get_value = webnotes.conn.get_value
@@ -546,17 +545,10 @@
 			tuple(delete_list))
 			
 		return obj.doclist
-
-	# Get total in words
-	# ==================================================================	
-	def get_total_in_words(self, currency, amount):
-		from webnotes.utils import money_in_words
-		return money_in_words(amount, currency)
 		
 
-	# Get month based on date (required in sales person and sales partner)
-	# ========================================================================
 	def get_month(self,date):
+		"""Get month based on date (required in sales person and sales partner)"""
 		month_list = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December']
 		month_idx = cint(cstr(date).split('-')[1])-1
 		return month_list[month_idx]
@@ -616,10 +608,7 @@
 					"fiscal_year": fiscal_year
 				}, raise_exception=1)
 
-	# get against document date	self.prevdoc_date_field
-	#-----------------------------
 	def get_prevdoc_date(self, obj):
-		import datetime
 		for d in getlist(obj.doclist, obj.fname):
 			if d.prevdoc_doctype and d.prevdoc_docname:
 				if d.prevdoc_doctype == 'Sales Invoice':
diff --git a/selling/doctype/sales_order/sales_order.py b/selling/doctype/sales_order/sales_order.py
index f035cdc..8686081 100644
--- a/selling/doctype/sales_order/sales_order.py
+++ b/selling/doctype/sales_order/sales_order.py
@@ -21,14 +21,13 @@
 from webnotes.model.wrapper import getlist
 from webnotes.model.code import get_obj
 from webnotes import msgprint
-from setup.utils import get_company_currency
 
 sql = webnotes.conn.sql
 	
 
-from utilities.transaction_base import TransactionBase
+from controllers.selling_controller import SellingController
 
-class DocType(TransactionBase):
+class DocType(SellingController):
 	def __init__(self, doc, doclist=None):
 		self.doc = doc
 		if not doclist: doclist = []
@@ -204,6 +203,8 @@
 				raise Exception
 	
 	def validate(self):
+		super(DocType, self).validate()
+		
 		self.validate_fiscal_year()
 		self.validate_order_type()
 		self.validate_mandatory()
@@ -215,16 +216,9 @@
 		sales_com_obj.check_active_sales_items(self)
 		sales_com_obj.check_conversion_rate(self)
 
-				# verify whether rate is not greater than max_discount
 		sales_com_obj.validate_max_discount(self,'sales_order_details')
-				# this is to verify that the allocated % of sales persons is 100%
 		sales_com_obj.get_allocated_sum(self)
 		self.doclist = sales_com_obj.make_packing_list(self,'sales_order_details')
-
-				# get total in words
-		dcc = get_company_currency(self.doc.company)		
-		self.doc.in_words = sales_com_obj.get_total_in_words(dcc, self.doc.rounded_total)
-		self.doc.in_words_export = sales_com_obj.get_total_in_words(self.doc.currency, self.doc.rounded_total_export)
 		
 		if not self.doc.status:
 			self.doc.status = "Draft"
@@ -268,7 +262,8 @@
 		self.check_prev_docstatus()		
 		self.update_stock_ledger(update_stock = 1)
 		# update customer's last sales order no.
-		update_customer = sql("update `tabCustomer` set last_sales_order = '%s', modified = '%s' where name = '%s'" %(self.doc.name, self.doc.modified, self.doc.customer))
+		sql("""update `tabCustomer` set last_sales_order = '%s', modified = '%s' 
+			where name = '%s'""" % (self.doc.name, self.doc.modified, self.doc.customer))
 		get_obj('Sales Common').check_credit(self,self.doc.grand_total)
 		
 		get_obj('Authorization Control').validate_approving_authority(self.doc.doctype, self.doc.grand_total, self)
diff --git a/stock/doctype/delivery_note/delivery_note.py b/stock/doctype/delivery_note/delivery_note.py
index 53f66c3..4c5aeee 100644
--- a/stock/doctype/delivery_note/delivery_note.py
+++ b/stock/doctype/delivery_note/delivery_note.py
@@ -21,14 +21,13 @@
 from webnotes.model.wrapper import getlist
 from webnotes.model.code import get_obj
 from webnotes import msgprint
-from setup.utils import get_company_currency
 
 sql = webnotes.conn.sql
 
 
-from utilities.transaction_base import TransactionBase
+from controllers.selling_controller import SellingController
 
-class DocType(TransactionBase):
+class DocType(SellingController):
 	def __init__(self, doc, doclist=[]):
 		self.doc = doc
 		self.doclist = doclist
@@ -131,6 +130,8 @@
 
 
 	def validate(self):
+		super(DocType, self).validate()
+		
 		import utilities
 		utilities.validate_status(self.doc.status, ["Draft", "submitted", "Cancelled"])
 
@@ -144,14 +145,9 @@
 		self.validate_mandatory()
 		self.validate_reference_value()
 		self.validate_for_items()
-		sales_com_obj.validate_max_discount(self, 'delivery_note_details')						 #verify whether rate is not greater than max discount
-		sales_com_obj.get_allocated_sum(self)	# this is to verify that the allocated % of sales persons is 100%
+		sales_com_obj.validate_max_discount(self, 'delivery_note_details')
+		sales_com_obj.get_allocated_sum(self)
 		sales_com_obj.check_conversion_rate(self)
-		
-		# Get total in Words
-		dcc = get_company_currency(self.doc.company)
-		self.doc.in_words = sales_com_obj.get_total_in_words(dcc, self.doc.rounded_total)
-		self.doc.in_words_export = sales_com_obj.get_total_in_words(self.doc.currency, self.doc.rounded_total_export)
 
 		# Set actual qty for each item in selected warehouse
 		self.update_current_stock()