CREATE TABLE table_65139 ("Title" TEXT, "Series" TEXT, "Director" TEXT, "Production Number" FLOAT, "Release date" TEXT)

What is the production number directed by Robert McKimson in series mm titled People Are Bunny?
SELECT SUM("Production Number") FROM table_65139 WHERE "Director" = 'robert mckimson' AND "Series" = 'mm' AND "Title" = 'people are bunny'
SELECT SUM("Production Number") FROM "table_65139" WHERE "Director" = 'robert mckimson' AND "Series" = 'mm' AND "Title" = 'people are bunny'