 What is the total of Apparent magnitudes for an NGC number larger than 3293?
CREATE TABLE table_78337 (
    "NGC number" real,
    "Object type" text,
    "Constellation" text,
    "Right ascension ( J2000 )" text,
    "Declination ( J2000 )" text,
    "Apparent magnitude" real
)
SELECT SUM("Apparent magnitude") FROM table_78337 WHERE "NGC number" > '3293'