SQL aggregate functions

SELECT p.[name]
 FROM products p
 WHERE p.product_id in (SELECT s.product_id
     FROM productsales s
     WHERE s.[date] between @dateStart and @dateEnd
     GROUP BY s.product_id
     HAVING Sum(s.quantity) > @X )

HAVING (Sum(s.quantity*s.price)) > @X

SELECT p.name from products p
WHERE p.product_id IN
    (SELECT product_id from
    	(SELECT product_id, (quantity * price) as total
    	 FROM productsales WHERE date between @dateStart and @dateEnd) as s
    GROUP by s.product_id
    HAVING sum(total) > @x)