How much is the total price of all the orders shipped to customers in Argentina?
total price = sum(o_totalprice); Argentina refers to n_name = 'Argentina'
SELECT SUM(T3.o_totalprice) FROM customer AS T1 INNER JOIN nation AS T2 ON T1.c_nationkey = T2.n_nationkey INNER JOIN orders AS T3 ON T1.c_custkey = T3.o_custkey WHERE T2.n_name = 'ARGENTINA'