WPdesk Dropshipping Mapper Stock Filter

add_filter('wpdesk_dropshipping_mapper_stock', function( $value){
 if( $value === "a lot" ){
  return 99;
 }elseif( $value === "average" ){
  return 10;
 }elseif( $value === "low" ){
  return 1;
 }
return 0;
});