if (!exists $cache->{$date}) {
$cache->{$date} =
$self->get_chart(type => $is_sales ? 'income' : 'expense', taxzone => $taxzone)
if (!exists $cache->{$date}) {
$cache->{$date} =
$self->get_chart(type => $is_sales ? 'income' : 'expense', taxzone => $taxzone)