E-Commerce Configuration Guide : Site Configuration Settings : NonMax4SaleQty : ShowTotalItemPriceInLineItemLists
 
ShowTotalItemPriceInLineItemLists
Key value:
0 or 1
Description:
Enables (1) or disables (0) the ability to show item total price, including taxes and discounts, in the shopping cart. Set ShowTotalItemPriceInLineItemLists to 1 to show item prices which include taxes in the cart, set to 0 to show item prices without taxes in the cart.
See also:
SingleTaxLine