def formula(individu, period, parameters):
    """
        Plus values de court terme
        """
    frag_pvct = individu('frag_pvct', period)
    mbic_pvct = individu('mbic_pvct', period)
    macc_pvct = individu('macc_pvct', period)
    mbnc_pvct = individu('mbnc_pvct', period)
    mncn_pvct = individu('mncn_pvct', period)
    return frag_pvct + macc_pvct + mbic_pvct + mbnc_pvct + mncn_pvct
