CREATE TABLE table_62173 ("Season" FLOAT, "Timeslot  ( EDT ) " TEXT, "Season premiere" TEXT, "Season finale" TEXT, "TV season" TEXT, "Rank" TEXT, "Viewers  ( in millions ) " FLOAT, "18\\u201349 average" FLOAT)

Which season had a season finale of May 13, 2012?
SELECT SUM("Season") FROM table_62173 WHERE "Season finale" = 'may 13, 2012'
SELECT SUM("Season") FROM "table_62173" WHERE "Season finale" = 'may 13, 2012'