When a physical product is listed as $0, the displayed message on the product page is no longer "add to cart" but instead "contact us to purchase".
How can I edit this message? I have some products that have many variants, and I want to make the product default price $0 so that it doesn't show a price until the customer selects a variant (which has its own unique price). The problem with this idea is that the "add to cart" button says "Contact us to purchase" until a variant is selected, and I'm afraid this will deter customers who might think the product is out of stock.
How can this message be edited? And can it be edited for select products only?