By default, this maps the following fields from the CDR:
+acctid => acctid
rated_price => amount
rated_classnum => classnum
rated_seconds => duration
$price = 0 if $cdr->freesidestatus eq 'no-charge';
FS::cust_bill_pkg_detail->new( {
+ 'acctid' => $cdr->acctid,
'amount' => $price,
'classnum' => $cdr->rated_classnum,
'duration' => $cdr->rated_seconds,