CREATE TABLE table_57157 ("Rank" FLOAT, "Name" TEXT, "Nation" TEXT, "Points" FLOAT, "Placings" FLOAT)

Tell me the sum of rank for placings of 58
SELECT SUM("Rank") FROM table_57157 WHERE "Placings" = '58'
SELECT SUM("Rank") FROM "table_57157" WHERE "Placings" = '58'