CREATE TABLE table_65013 ("Date" TEXT, "Ship Name" TEXT, "Flag" TEXT, "Tonnage  (  GRT  ) " FLOAT, "Fate" TEXT, "Deaths" FLOAT)

How much tonnage has a Fate of sunk, and a Flag of great britain, and a Date of 26 september 1940, and Deaths of 2?
SELECT SUM("Tonnage ( GRT )") FROM table_65013 WHERE "Fate" = 'sunk' AND "Flag" = 'great britain' AND "Date" = '26 september 1940' AND "Deaths" = '2'
SELECT SUM("Tonnage ( GRT )") FROM "table_65013" WHERE "Date" = '26 september 1940' AND "Deaths" = '2' AND "Fate" = 'sunk' AND "Flag" = 'great britain'