Hi mentservices
I said that I can guide you on "how to get the purchase price for any product with code" (that is the part related to ATUM) but helping you to change/show this on the frontend is a customization that is out of the scope of our support service, I'm sorry. So, I'd kindly recommend you find a developer to assist you with it.
Getting the purchase price of any product is simple:
$product = \Atum\Inc\Helpers::get_atum_product( $product_id );
$purchase_price = $product->get_purchase_price();
Best Regards,
Salva.