Question: What is the production number of From Hare to Heir?
SQL: SELECT SUM("Production Number") FROM "2-18792950-1" WHERE "Title" = 'From Hare to Heir';

Question: What is the Series number of the episode with a production number of 1547?
SQL: SELECT "Series" FROM "2-18792950-1" WHERE "Production Number" = 1547.0;

Question: What is the production number for the episode directed by robert mckimson named mice follies?
SQL: SELECT COUNT("Production Number") FROM "2-18792950-1" WHERE "Director" = 'robert mckimson' AND "Title" = 'mice follies';