+ # finedays is in days, so hourly loans must multiply by 24
+ # thus 1 hour late equals 1 day suspension * finedays rate
+ $finedays = $finedays * 24 if ($unit eq 'hours');
+
+ # grace period is measured in the same units as the loan
+ my $grace = DateTime::Duration->new( $unit => $issuingrule->{firstremind} );