woocommerce add variable after price

by

use woocommerce_single_product_summary action hook with priority 15

//test
add_action('woocommerce_single_product_summary','ravs_credits',15);
function ravs_credits(){
    echo'testing';
}

above code print testing below price on product page.

Important Link:

woocommerce_single_product_summary hook

WordPress hooks introduction

Updated:

I am assuming that your credit range form 1 to 100 and you specify them.now

  1. create custom meta box in product post type.read
    How To Create Custom Post Meta Boxes
  2. read this technique to create product rating in css

now you get meta box in each product,give it a value between 1 to 100
now code look like

//credits with rating
    add_action('woocommerce_single_product_summary','ravs_credits',15);
    function ravs_credits(){
     global $post;
     ?>
     <div class="ravs-credits">
       <p>This package will grant you <?php echo get_post_meta($post->ID, $key, $single); ?> Stars</p>
       <span style="width:<?php echo get_post_meta($post->ID, $key, $single); ?>%" class="rating"></span>
     </div>
     <?php
    }

Important Link:

  1. get_post_meta()