def reset_totals(totals_dict):
    """Reset totals_dict to zero for each variable.
    
    Args:
        totals_dict (dict): Dictionary holding expense totals.
        
    Returns:
        totals_dict (dict): totals_dict with expense totals rest to 0.
    """
    totals_dict['total_weekly'] = 0
    totals_dict['total_fortnightly'] = 0
    totals_dict['total_monthly'] = 0
    totals_dict['total_annually'] = 0
    totals_dict['frequency'] = ''
    totals_dict['amount'] = 0
    return totals_dict