from typing import Optional


def filter_106_sum_lines(obj: dict) -> Optional[bool]:
    """Filter our unneeded lines in Form 106Sum

    :param obj: Pdf line
    :return: Whether to keep filtered lines
    """
    if obj["width"] < 20:
        return False
    if obj["top"] < 60:
        return False
    if obj["x0"] < 360:
        return False
    return True