CREATE TABLE table_56995 ("Name" TEXT, "Latitude" FLOAT, "Longitude" FLOAT, "Diameter  ( km ) " FLOAT, "Named after" TEXT)

Tell me the sum of longitude for diameter being 22.6 and latitude less than -12.4
SELECT SUM("Longitude") FROM table_56995 WHERE "Diameter (km)" = '22.6' AND "Latitude" < '-12.4'
SELECT SUM("Longitude") FROM "table_56995" WHERE "Diameter (km)" = '22.6' AND "Latitude" < '-12.4'