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function replace_price_with_quote($price, $product) {
    if (function_exists('b2bking') && b2bking()->user_has_p_in_cart('quote') === 'yes') {
        return 'Quote';
    }
    return $price;
}
add_filter('woocommerce_get_price_html', 'replace_price_with_quote', 10, 2);
add_filter('woocommerce_cart_item_price', 'replace_price_with_quote', 10, 2);
add_filter('woocommerce_cart_item_subtotal', 'replace_price_with_quote', 10, 2);
add_filter('woocommerce_order_formatted_line_subtotal', 'replace_price_with_quote', 10, 2);