def get_weighted_completion_scores(job_list):
    """
    Gets the weighted completion score for a set of jobs by taking the sum of
    the total time elapsed at the end of each job * job weight.
    """
    total_length, score = 0, 0

    for job in job_list:
        total_length += job[1]
        score += (total_length * job[0])
    return score