Genesis - modify main loop title only

genesis-modify-title.php

<?php
add_filter( 'genesis_post_title_text', 'child_modify_title' );
/**
 * Add price to post title when category is 'current stock'
 *
 * This will only show the price on "main loop"
 *
 * @param string $title, post title text, as per genesis_do_post_title()
 * @return string $title, modified title
 */
function child_modify_title( $title ) {
    
    if( in_category( 'shop-news' ) ) {
    	
    	global $post;
    
    	$price = get_post_meta( $post->ID, 'Prijs', true );
   		
    	$title = $title . ' ~ &euro;' . $price; 
   
	}   
    
    return $title;
}