+sub parse_form_customerprices {
+  my ($self) = @_;
+
+  my $customerprices_map;
+  if ( $self->part->customerprices ) { # check for new parts or parts without customerprices
+    $customerprices_map = { map { $_->id => Rose::DB::Object::Helpers::clone($_) } @{$self->part->customerprices} };
+  };
+
+  $self->part->customerprices([]);
+
+  my $position = 0;
+  my $customerprices = delete($::form->{customerprices}) || [];
+  foreach my $customerprice ( @{$customerprices} ) {
+    next unless $customerprice->{customer_id};
+    $position++;
+    my $customer = SL::DB::Manager::Customer->find_by(id => $customerprice->{customer_id}) || die "Can't find customer from id";
+
+    my $id = $customerprices_map->{$customerprice->{id}} ? $customerprices_map->{$customerprice->{id}}->id : undef;
+    my $cu = SL::DB::PartCustomerPrice->new( # parts_id   => $self->part->id, # will be assigned by row add_customerprices
+                                     id                   => $id,
+                                     customer_id          => $customerprice->{customer_id},
+                                     customer_partnumber  => $customerprice->{customer_partnumber} || '',
+                                     price                => $::form->parse_amount(\%::myconfig, $customerprice->{price_as_number}),
+                                     sortorder            => $position,
+                                   );
+    if ($customerprices_map->{$cu->id} && !$customerprices_map->{$cu->id}->lastupdate && $customerprices_map->{$cu->id}->price == 0 && $cu->price == 0) {
+      # lastupdate isn't set, original price is 0 and new lastcost is 0
+      # don't change lastupdate
+    } elsif ( !$customerprices_map->{$cu->id} && $cu->price == 0 ) {
+      # new customerprice, no lastcost entered, leave lastupdate empty
+    } elsif ($customerprices_map->{$cu->id} && $customerprices_map->{$cu->id}->price == $cu->price) {
+      # price hasn't changed, use original lastupdate
+      $cu->lastupdate($customerprices_map->{$cu->id}->lastupdate);
+    } else {
+      $cu->lastupdate(DateTime->now);
+    };
+    $self->part->add_customerprices($cu);
+  };
+}
+