def callback_c(n, durationValue, amountValue, rvValue, scheduleRows, modeValue,
               rateValue, **kwargs):
    user = kwargs['user']
    if n is None:
        user = kwargs['user']
        return [
            html.Div('Lease quote', className='h3 mb-0'),
            dbc.Button("Save quote",
                       id="save_quote_button",
                       className="d-none d-md-block btn btn-sm btn-primary"),
        ]

        return dash.no_update
    else:
        if n > 1:
            return [
                html.Div('Lease quote', className='h3 mb-0'),
            ]
        customer = get_object_or_404(Customer, pk=1)
        contract = Contract()
        contract.customer = customer
        contract.user = user
        contract.status = 'Created'
        contract.creation_date = datetime.date.today()
        contract.status_date = datetime.date.today()
        contract.save()
        schedule = Schedule()
        schedule.contract = contract
        schedule.mode = modeValue
        schedule.rv = rvValue
        schedule.amount = amountValue
        schedule.start_date = startdate
        schedule.rate = rateValue / 120000

        schedule.save()
        i = 0
        for scheduleRow in scheduleRows:
            if (modeValue == '01'):
                date = startdate + relativedelta(months=i)
            else:
                date = startdate + relativedelta(months=i + 1)
            i = i + 1
            step = Step()
            step.schedule = schedule
            step.rent = scheduleRow['rent']
            step.balance = scheduleRow['balance']
            step.date = date
            step.save()

        return [
            html.Div('Lease quote', className='h3 mb-0 text-gray-800'),
            html.Div('Quote saved !', className='h3 mb-0 text-gray-800'),
        ]