diff --git a/templates/CRM/Lineitemedit/Form/AddLineItems.tpl b/templates/CRM/Lineitemedit/Form/AddLineItems.tpl
index 3e10d0b..e37a012 100644
--- a/templates/CRM/Lineitemedit/Form/AddLineItems.tpl
+++ b/templates/CRM/Lineitemedit/Form/AddLineItems.tpl
@@ -173,7 +173,15 @@ CRM.$(function($) {
     }
 
     let total_amount = 0;
-    if ($('input[id="total_amount"]').length) {
+
+    if (lineItemRows.length > 0) {
+      lineItemTable.rows.forEach(lineItem => {
+        if (lineItem.total_price) {
+          total_amount += parseFloat((lineItem.total_price.replace(thousandMarker,'') || 0));
+        }
+      });
+    }
+    else if ($('input[id="total_amount"]').length) {
       total_amount = parseFloat(($('input[id="total_amount"]').val().replace(thousandSeparator,'') || 0));
     }