I added new “Markup” field into commerce_product table using custom module. Now I need to create a rule to calculate (sell_price=prod_price*markup), but I can’t acccess Markup field throught Rules selectors. Is there a UI , or what hooks should I implement to solve that problem? Here is complete comm_markup module code:

function comm_markup_schema_alter(&$schema) {   $schema['commerce_product']['fields']['markup'] = array(     'type' => 'float',     'not null' => TRUE,     'default' => 1,     'description' => 'Price markup field',   ); }  function comm_markup_install() {   $schema = drupal_get_schema('commerce_product');   db_add_field('commerce_product', 'markup', $schema['fields']['markup']); }  function comm_markup_entity_property_info_alter(&$info) {   $properties = &$info['commerce_product']['properties'];   $properties['markup'] = array(     'label' => t('Price markup'),     'type' => 'decimal',     'description' => 'Gross price multiplier (defines profit amount).',     'schema field' => 'markup',     'getter callback' => 'entity_property_verbatim_get',     'setter callback' => 'entity_property_verbatim_set',   ); }  function comm_markup_views_data_alter(&$data) {   $data['commerce_product']['markup'] = array(     'title' => t('Price markup field'),     'help' => t('Multiplier. Adds profit to the gross price.'),     'field' => array(       'handler' => 'views_handler_field_numeric',       'click sortable' => TRUE,     ),     'filter' => array(       'handler' => 'views_handler_filter_numeric',     ),     'sort' => array(       'handler' => 'views_handler_sort',     ),   ); }