$lastdate = ($freq == 1 ? add_days($date_, 7*$per)
: ($freq == 2 ? add_days($date_, 14*$per)
: ($freq == 3 ? add_months($date_, $per)
$lastdate = ($freq == 1 ? add_days($date_, 7*$per)
: ($freq == 2 ? add_days($date_, 14*$per)
: ($freq == 3 ? add_months($date_, $per)