croak("Undefined unit " . $item->unit) if !$item_unit;
$item->base_qty($item_unit->convert_to($item->qty, $part_unit));
+ $item->fxsellprice($item->sellprice);
my $num_dec = _num_decimal_places($item->sellprice);
my $discount = _round($item->sellprice * ($item->discount || 0), $num_dec);