diff --git a/erpnext/controllers/taxes_and_totals.py b/erpnext/controllers/taxes_and_totals.py
index c1c1fd7..87c4719 100644
--- a/erpnext/controllers/taxes_and_totals.py
+++ b/erpnext/controllers/taxes_and_totals.py
@@ -462,9 +462,9 @@
 
 		if self.doc.is_pos:
 			for payment in self.doc.get('payments'):
-				payment.base_amount = flt(payment.amount * self.doc.conversion_rate)
-				paid_amount += payment.amount
-				base_paid_amount += payment.base_amount
+				payment.base_amount = flt(flt(payment.amount) * self.doc.conversion_rate)
+				paid_amount += flt(payment.amount)
+				base_paid_amount += flt(payment.base_amount)
 		elif not self.doc.is_return:
 			self.doc.set('payments', [])