def formula_2010_01_01(foyer_fiscal, period, parameters):
    """
        Aide aux créateurs et repreneurs d'entreprises
        2010-2011
        """
    f7fy = foyer_fiscal('f7fy_2011', period)
    f7gy = foyer_fiscal('f7gy', period)
    f7jy = foyer_fiscal('f7jy', period)
    f7hy = foyer_fiscal('f7hy', period)
    f7ky = foyer_fiscal('f7ky', period)
    f7iy = foyer_fiscal('f7iy', period)
    f7ly = foyer_fiscal('f7ly', period)
    f7my = foyer_fiscal('f7my', period)
    P = parameters(period).impot_revenu.reductions_impots.creaen
    return P.base * (f7jy + f7fy + (f7hy + f7ly) / 2) + P.hand * (f7ky +
        f7gy + (f7iy + f7my) / 2)
