Each offer has a limited duration that expires at the specified time. Some online promotions may require that you enter a code upon checkout to redeem the discount. All sales and promotions exclude course materials, gift cards, graduation gear, art and school supplies, technology supplies, Apple products, Ray-Ban, Peter Millar, Yeti, Alumni commemorative ornaments, and all clearance items. Promotions cannot be combined with any additional offers or discounts, and will only apply to a single transaction. Discounts can only be applied to in-stock items.