my ($default_taxchart, $taxchart_to_use);
my $amount_chart_id = $form->{"AP_amount_chart_id_$i"} || $default_ap_amount_chart_id;
my $chart_has_changed = $::form->{"previous_AP_amount_chart_id_$i"} && ($amount_chart_id != $::form->{"previous_AP_amount_chart_id_$i"});
my ($default_taxchart, $taxchart_to_use);
my $amount_chart_id = $form->{"AP_amount_chart_id_$i"} || $default_ap_amount_chart_id;
my $chart_has_changed = $::form->{"previous_AP_amount_chart_id_$i"} && ($amount_chart_id != $::form->{"previous_AP_amount_chart_id_$i"});