projekt kivitendo

        $periods-- while $periods > 0

          && $self->add_months($period_start_date, -1 * ($periods - 1) * $i_period) < $item_config->start_date;

      }

        my $periods_from_end = 0;

        $periods_from_end++ while $periods_from_end < $periods

          && $self->add_months($period_start_date, -1 * ($periods_from_end)) > $item_config->end_date;

      }

      return if $periods == 0;

      $new_item->qty($new_item->qty * $periods);

    }

  }