CREATE TABLE table_42213 ("Volume:Issue" TEXT, "Issue Date ( s ) " TEXT, "Weeks on Top" FLOAT, "Song" TEXT, "Artist" TEXT)

What is the sum of Weeks on Top for the Volume:Issue 34:9-12?
SELECT SUM("Weeks on Top") FROM table_42213 WHERE "Volume:Issue" = '34:9-12'
SELECT SUM("Weeks on Top") FROM "table_42213" WHERE "Volume:Issue" = '34:9-12'