CREATE TABLE table_13829 ("Date" FLOAT, "Ships sunk  ( Pola ) " CLOB, "Tonnage" CLOB, "U-boats destroyed  ( KuK ) " CLOB, "U-boats destroyed  ( Pola ) " CLOB)

What is the listed Tonnage that has U-boats destroyed (KuK) of 2 and Ships sunk (Pola) of (not recorded)?
SELECT "Tonnage" FROM table_13829 WHERE "U-boats destroyed (KuK)" = '2' AND "Ships sunk (Pola)" = '(not recorded)'
SELECT "Tonnage" FROM "table_13829" WHERE "Ships sunk (Pola)" = '(not recorded)' AND "U-boats destroyed (KuK)" = '2'