my $usage = << 'ENDUSAGE';
This script calculates and charges overdue fines
-to patron accounts. If the Koha System Preference
-'finesMode' is set to 'production', the fines are charged
-to the patron accounts. If set to 'test', the fines are
-calculated but not applied.
+to patron accounts. The Koha system preference 'finesMode' controls
+whether the fines are calculated and charged to the patron accounts ("Calculate and charge");
+calculated and emailed to the admin but not applied ("Calculate (but only for mailing to the admin)"); or not calculated ("Don't calculate").
This script has the following parameters :
-h --help: this message