CREATE TABLE table_203_612 (id DECIMAL, "rank" DECIMAL, "nation" TEXT, "gold" DECIMAL, "silver" DECIMAL, "bronze" DECIMAL, "total" DECIMAL)

what is the difference in medals for fiji and tonga ?
SELECT (SELECT "total" FROM table_203_612 WHERE "nation" = 'fiji') - (SELECT "total" FROM table_203_612 WHERE "nation" = 'tonga')
SELECT (SELECT "total" FROM "table_203_612" WHERE "nation" = 'fiji') - (SELECT "total" FROM "table_203_612" WHERE "nation" = 'tonga')