def summer_rabatt(vareliste, f?rpris, nypris): #liste, ordbok, ordbok
    rabatt = 0

    for n?kkel in vareliste:
        rabatt += f?rpris[n?kkel] - nypris[n?kkel]
    return rabatt




assert summer_rabatt(["br?d", "melk"], {"br?d":10, "melk":25}, {"br?d":5, "melk":20}) == 10# dette skal returnere 10

print(summer_rabatt(["br?d", "melk"], {"br?d":10, "melk":25}, {"br?d":5, "melk":20}))