use strict;
use List::Util qw(sum);
-use SL::AM;
use SL::DB::MetaSetup::OrderItem;
use SL::DB::Manager::OrderItem;
my $d_orders = $self->order->linked_records(direction => 'to', to => 'SL::DB::DeliveryOrder');
my @doi = grep { $_->parts_id == $self->parts_id } map { $_->orderitems } @$d_orders;
+ require SL::AM;
return sum(map { AM->convert_unit($_->unit => $self->unit) * $_->qty } @doi);
}