To order multiple quantities of a product, change the number in the quantity box and then click the "update" link to the right of that item listing. To remove an item from your cart, click the "remove" link to the right of the item listing.
If you are ordering any product that requires you to specify any information for the item, you will do so in the checkout process. We have provided a step in that process to allow for specifying the grade for placemat stickers and so on.