code: function smsGetCampaignCost(callback, sender_name, body, addressbook_id, phones){
      if (sender_name === undefined) {
          return callback(returnError("Empty sender name"));
      }
      if (body === undefined) {
          return callback(returnError("Empty sms text"));
      }
      if ((addressbook_id === undefined) || (phones === undefined) || (!phones.length)) {
          return callback(returnError("Empty book id or phones"));
      }
      var data = {
          'sender': sender_name,
          'body': body,
          'addressBookId': addressbook_id
      }
      if (phones.length) {
          data['phones'] = JSON.stringify(phones);
      }
  
      sendRequest('sms/campaigns/cost', 'GET', data, true, callback);
  }
docs: Get cost sms campaign
  
  @param callback
  @param sender
  @param body
  @param addressbook_id
  @param phones