var spreadsheetId =  SpreadsheetApp.getActiveSpreadsheet().getId();
var spreadsheetFile =  DriveApp.getFileById(spreadsheetId);
var folderId = spreadsheetFile.getParents().next().getId();

function getParentFolder(){
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var file = DriveApp.getFileById(ss.getId());
  var folders = file.getParents();
  while (folders.hasNext()){
    Logger.log('folder name = '+folders.next().getName());
    Logger.log('folder name = '+folders.next().getId());
  }
}

// Без округления
console.log(Math.trunc(num % 1 * 100))

 * это и триггер и конфигурация вашего триггера

function merge() {
  var folder = DriveApp.getFolderById('<ID FOLDER>'); // folder with files pdf
  var files = folder.getFiles(); // get all files pdf
  
  var formData = {};
  var index = 0;
  while(files.hasNext()) {
    var file = files.next();
    formData['Files[' + index + ']'] = file.getBlob();
    index++;
  }
  
  var options = {
    'method' : 'post',
    'payload' : formData,
    'muteHttpExceptions': true
  };
 
  var response = UrlFetchApp.fetch('https://v2.convertapi.com/pdf/to/merge?Secret=<YOUR SECRET>', options);
  
  if(response.getResponseCode() == 200) {
    var contentText = JSON.parse(response.getContentText());
    var blob = Utilities.base64Decode(contentText.Files[0].FileData);
    folder.createFile(Utilities.newBlob(blob, 'application/pdf', 'merge.pdf'));
  }
}

var assingDestruction(){
const obj = { foo: 1, bar: 1 };
console.log({ ...obj, baz: 1 })
}