Access Formula field in Suitelet sublist of saved search

Created saved search where result contains following columns
1.amount
2.type
3.number
4.formula text

Above saved search I m trying to access in my suitelet sublist as below,
sublist.addField('tranid','text', 'Number.');
sublist.addField('amount','text', 'Amount');
sublist.addField('type','text', 'Transaction Type');

but how do I access the formula text field in suitelet sublist

I haved tried following
if(results.length>0)
{
  var columns = results[0].getAllColumns();
  var result = results[0];
  for(var i=0; i<columns.length; i++)
  {
   var column = columns[i];
   var label = column.getLabel();
   var formula = column.getFormula();
   var functionName = column.getFunction();
   var value = result.getValue(column);