thanks for the response, still couldn't figure
I tried this

\nimport 'dart:convert';\nimport 'dart:math' as math;\n\nimport 'package:flutter/material.dart';\nimport 'package:google_fonts/google_fonts.dart';\nimport 'package:intl/intl.dart';\nimport 'package:timeago/timeago.dart' as timeago;\nimport '/flutter_flow/lat_lng.dart';\nimport '/flutter_flow/place.dart';\nimport '/flutter_flow/uploaded_file.dart';\nimport '/flutter_flow/custom_functions.dart';\nimport '/backend/backend.dart';\nimport 'package:cloud_firestore/cloud_firestore.dart';\nimport '/auth/firebase_auth/auth_util.dart';\n\nint? newCustomFunction(List<DocumentReference> objects) {\n  /// MODIFY CODE ONLY BELOW THIS LINE\n\n  int calculateTotalAmount(List<dynamic> objects) {\n    int total = 0;\n\n    for (var obj in objects) {\n      if (obj is Map<String, dynamic> && obj.containsKey(\"total_calories\")) {\n        var amountValue = obj[\"total_calories\"];\n\n        if (amountValue is String) {\n          int amount = int.tryParse(amountValue) ?? 0;\n          total += amount;\n        } else if (amountValue is num) {\n          total += amountValue.toInt();\n        }\n      }\n    }\n\n    return total;\n  }\n\n  return calculateTotalAmount(objects);\n\n  /// MODIFY CODE ONLY ABOVE THIS LINE\n}

and did function settings

but while selecting function in text block - where i want to print values, don't key option to select value? or what option should i select ?

Possible for jump on quick screenshare/video - really appreciate the help

Getting - total sum of a integer value(across all rows) from firebase collection ?