CREATE TABLE table_56140 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Director" TEXT, "Writer ( s ) " TEXT, "Original air date" TEXT, "Production code" TEXT)

What is the total series numbers that is directed by Jefferson Kibbee and has a production code of 2398191?
SELECT SUM("No. in series") FROM table_56140 WHERE "Director" = 'jefferson kibbee' AND "Production code" = '2398191'
SELECT SUM("No. in series") FROM "table_56140" WHERE "Director" = 'jefferson kibbee' AND "Production code" = '2398191'