+=item desc
+
+Returns a description for this line item. For typical line items, this is the
+I<pkg> field of the corresponding B<FS::part_pkg> object (see L<FS::part_pkg>).
+For one-shot line items and named taxes, it is the I<itemdesc> field of this
+line item, and for generic taxes, simply returns "Tax".
+
+=cut
+
+sub desc {
+ my $self = shift;
+
+ if ( $self->pkgnum > 0 ) {
+ $self->cust_pkg->part_pkg->pkg;
+ } else {
+ $self->itemdesc || 'Tax';
+ }
+}
+
+=item owed_setup
+
+Returns the amount owed (still outstanding) on this line item's setup fee,
+which is the amount of the line item minus all payment applications (see
+L<FS::cust_bill_pay_pkg> and credit applications (see
+L<FS::cust_credit_bill_pkg>).
+
+=cut
+
+sub owed_setup {
+ my $self = shift;
+ $self->owed('setup', @_);
+}
+
+=item owed_recur
+
+Returns the amount owed (still outstanding) on this line item's recurring fee,
+which is the amount of the line item minus all payment applications (see
+L<FS::cust_bill_pay_pkg> and credit applications (see
+L<FS::cust_credit_bill_pkg>).
+
+=cut
+
+sub owed_recur {
+ my $self = shift;
+ $self->owed('recur', @_);
+}
+
+# modeled after cust_bill::owed...
+sub owed {
+ my( $self, $field ) = @_;
+ my $balance = $self->$field();
+ $balance -= $_->amount foreach ( $self->cust_bill_pay_pkg($field) );
+ $balance -= $_->amount foreach ( $self->cust_credit_bill_pkg($field) );
+ $balance = sprintf( '%.2f', $balance );
+ $balance =~ s/^\-0\.00$/0.00/; #yay ieee fp
+ $balance;
+}
+
+sub cust_bill_pay_pkg {
+ my( $self, $field ) = @_;
+ qsearch( 'cust_bill_pay_pkg', { 'billpkgnum' => $self->billpkgnum,
+ 'setuprecur' => $field,
+ }
+ );
+}
+
+sub cust_credit_bill_pkg {
+ my( $self, $field ) = @_;
+ qsearch( 'cust_credit_bill_pkg', { 'billpkgnum' => $self->billpkgnum,
+ 'setuprecur' => $field,
+ }
+ );
+}
+