@staticmethod
def get_time_unit(time_string: str):
    """
        Function that return the time unit from the string (Minutes/Hours)
        :param time_string: The original string with the time (ex. 50 Hours)
        :return: the unit of that time (ex. "Hours")
        """
    if '-' in time_string:
        return None
    start_pos = time_string.find(' ')
    return time_string[start_pos:].strip()
