CREATE TABLE table_67870 ("Member countries" CLOB, "Population" FLOAT, "Area  ( km\\u00b2 ) " FLOAT, "GDP  ( billion US$ ) " FLOAT, "GDP per capita  ( US$ ) " CLOB)

What is the population of the place that has an area (km ) of 30,528, and a GDP (billion US$) larger than 58.316?
SELECT SUM("Population") FROM table_67870 WHERE "Area (km\u00b2)" = '30,528' AND "GDP (billion US$)" > '58.316'
SELECT SUM("Population") FROM "table_67870" WHERE "Area (km\u00b2)" = '30,528' AND "GDP (billion US$)" > '58.316'