To enable this, create a smart collection named All Products and set the condition to 'Product price is greater than 0'. You can create a collection through the 'Collections' menu in Shopify admin. Or you can turn this section off through theme settings.
Original Price: $4.95
Promotional Sale: $0.00 (Just pay S&H) One per customer. While supplies last.
Give your cat a voice; You know it has an attitude...;)