How to modify price of items in the Google Product Feed

functions.php

<?php

function lw_woocommerce_gpf_feed_item_google( $feed_item, $product ) {
    // If you need to modify the prices sent in the feed, you can modify the following
    // properties of the feed_item object.
    
    // The regular price of the item.
    // $feed_item->regular_price_ex_tax
    // $feed_item->regular_price_inc_tax

    // The sale price of the item. Set to/leave as NULL if not required.
    // $feed_item->sale_price_ex_tax
    // $feed_item->sale_price_inc_tax
    
    // Set these to the sale price if it exists, otherwise the regular price.
    // $feed_item->price_ex_tax
    // $feed_item->price_inc_tax
    
    return $feed_item;
 }
 add_filter( 'woocommerce_gpf_feed_item_google', 'lw_woocommerce_gpf_feed_item_google', 10, 2 );