def convert_dollars_string_to_float(dollars_string):
    """Converts a string of the form '$x,xxx,xxx.xx' to its equivalent decimal value.

    :param dollars_string: A string in dollar and cents form to be converted.
    :returns: A floating-point number rounded to 2 decimal places.
    """
    return round(float(dollars_string.replace(',', '').replace('$', '')), 2)