What product has the fewest online orders from one customer? List the product's class, line of business, and list price.
fewest online orders refer to MIN(Quantity);
SELECT T2.Class, T2.ProductLine, T2.ListPrice FROM ShoppingCartItem AS T1 INNER JOIN Product AS T2 ON T1.ProductID = T2.ProductID GROUP BY T1.ProductID ORDER BY SUM(Quantity) LIMIT 1