self.get_queryset() \
            .annotate(created_at_date=TruncDate('created_at')) \
            .values('created_at_date') \
            .order_by('created_at_date') \
            .annotate(
            income=ExpressionWrapper((F('items__price') - F('items__product__cost_price'))
                                     * F('items__total_quantity'),
                                     output_field=models.DecimalField()),
            total_quantity=Sum('items__total_quantity')) \