CREATE TABLE table_31856 ("2nd component" TEXT, "b.p. 2nd comp.  ( \\u02daC ) " FLOAT, "3rd component" TEXT, "b.p. 3rd comp.  ( \\u02daC ) " FLOAT, "b.p. azeo.  ( \\u02daC ) " FLOAT)

Tell me the sum of bp 2nd comp with bp azeo of 57.5
SELECT SUM("b.p. 2nd comp. (\u02daC)") FROM table_31856 WHERE "b.p. azeo. (\u02daC)" = '57.5'
SELECT SUM("b.p. 2nd comp. (\u02daC)") FROM "table_31856" WHERE "b.p. azeo. (\u02daC)" = '57.5'