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Modifying the Items in a Remote Shopping Cart

Product Advertising API operations give you a lot of flexibility to modify the number of items in a cart. For example, use:

CartAdd—To add new items to a cart.
CartClear—To remove all items from a cart.
CartModify—To increase or decrease the number of items that are already in a cart, and to move items between the Active and the SaveForLater cart areas.
You can use this operation to delete a single item from a cart by setting its quantity to zero.

All of these operations can be used only on an existing remote shopping cart.

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