title: Checkout price issue using woocommerce_product_get_price hook
body: <p>I need to double the price for every product in Woocommerce frontend. For this I used the following code:</p>
  
  <pre><code>add_filter( 'woocommerce_product_get_price', 'double_price', 10, 2 );
  function double_price( $price, $product ){
      return $price*2;
  }
  </code></pre>
  
  <p>But there is an error using this code. checkout page price is not correct.
  for example the product orginal price is 10. We double the price by this code . so the product price is 20 now. When i added this product to the cart then cart and checkout page price is 40. That means this multiplication is take place in two times.</p>
  
  <p>Please help to solve this.</p>