def preu_abonament(p_base, edat, carnet):

    p_base2= p_base-p_base*0.2
    if edat < 18:
        p=p_base*0.75
        p2=p_base2*0.75
    elif edat<=64:
        p=p_base
        p2=p_base2
        if carnet =='Estudiant':
            p=p*0.9
            p2=p2*0.9
        elif carnet=='C_Barri':
            p=p*0.95
            p2=p2*0.95

    else:
        
        p=p_base*0.5
        p2=p_base2*0.5
        if carnet=='C_Barri':
            
            p=p-5
            p2=p2-5
    return int(p), int(p2)