- map { $form->{"${prefix}${_}${postfix}"} = ref($src->$_) eq 'DateTime' ? $src->$_->to_lxoffice : $src->$_ if $src->can($_) } @columns if !$format_amounts;
- map { $form->{"${prefix}${_}${postfix}"} = $::form->format_amount(\%::myconfig, $src->$_ * 1, 2) if $src->can($_) } @columns if $format_amounts;
+ @columns = grep { $src->can($_) } @columns;
+
+ map { $form->{"${prefix}${_}${postfix}"} = ref($src->$_) eq 'DateTime' ? $src->$_->to_lxoffice : $src->$_ } @columns if !$format_amounts;
+ map { $form->{"${prefix}${_}${postfix}"} = $::form->format_amount(\%::myconfig, $src->$_ * 1, 2) } @columns if $format_amounts == 1;
+ map { $form->{"${prefix}${_}${postfix}"} = $src->$_ * 1 ? $::form->format_amount(\%::myconfig, $src->$_ * 1, 2) : 0 } @columns if $format_amounts == 2;