A cart on the Pothi.com Online Store is equivalent to a shopping cart you use in a physical store. In a physical store, you will put all the items you want to buy in a shopping cart and then go to the billing counter to bill and pay for them together. Similarly, on the Pothi.com Online Store, all the books you want to buy should be added to the cart. Once all the books are there, you can click on checkout, where you provide the shipping and billing details for all the books together.