def decimal_str_to_int(decimal_string):
    """
    Helper to decimal currency string into integers (cents).
    WARNING: DO NOT TRY TO DO THIS BY CONVERSION AND MULTIPLICATION,
    FLOATING POINT ERRORS ARE NO FUN IN FINANCIAL SYSTEMS.
    @param string The amount in currency with full stop decimal separator
    @return integer The amount in cents
    """
    int_string = decimal_string.replace('.', '')
    int_string = int_string.lstrip('0')
    return int(int_string)
