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.
These are Pre-Order Items only, To have these items in August, Order date is July 5th. Any orders after July 5th may not be ready by the first day of school. These are final sale items, non-returnable or excangable.