changed field name, validation for change amount account, validation for serial no qty
diff --git a/erpnext/public/css/erpnext.css b/erpnext/public/css/erpnext.css
index b8d51c0..475b44b 100644
--- a/erpnext/public/css/erpnext.css
+++ b/erpnext/public/css/erpnext.css
@@ -137,12 +137,14 @@
   font-size: 15px;
 }
 .pos-payment-row .col-xs-6 {
-  padding: 10px;
+  padding: 15px;
 }
 .pos-payment-row {
   border-bottom: 1px solid #d1d8dd;
   margin: 2px 0px 5px 0px;
   height: 60px;
+  margin-top: 0px;
+  margin-bottom: 0px;
 }
 .pos-payment-row:hover,
 .pos-keyboard-key:hover {
@@ -202,3 +204,8 @@
 .pos-invoice-list {
   padding: 15px 10px;
 }
+.write_off_amount,
+.change_amount {
+  margin: 15px;
+  width: 130px;
+}