+sub delivered_qty {
+ my ($self) = @_;
+
+ return $self->_delivered_qty;
+}
+
+sub _delivered_qty {
+ my ($self) = @_;
+
+ return $self->{delivered_qty} if $self->{delivered_qty};
+
+ my $d_orders = $self->order->linked_records(direction => 'to', to => 'SL::DB::DeliveryOrder');
+
+ my @d_orders_delivered = grep { $_->delivered } @$d_orders;
+
+ my @doi_delivered = grep { $_->parts_id == $self->parts_id } map { $_->orderitems } @d_orders_delivered;
+
+ require SL::AM;
+ $self->{delivered_qty} = sum(map { AM->convert_unit($_->unit => $self->unit) * $_->qty } @doi_delivered);
+
+ return $self->{delivered_qty};
+}
+
+sub value_of_goods {
+ my ($self) = @_;
+
+ my $price_factor = $self->price_factor || 1;
+
+ $self->_delivered_qty;
+ return ($self->_delivered_qty * $self->sellprice * (1 - $self->discount ) / $price_factor);