CREATE TABLE table_name_87 (longitude INT, county VARCHAR, latitude VARCHAR)

How much Longitude has a County of nelson, and a Latitude larger than 47.980183?
SELECT SUM(longitude) FROM table_name_87 WHERE county = "nelson" AND latitude > 47.980183
SELECT SUM("longitude") FROM "table_name_87" WHERE "county" = "nelson" AND "latitude" > 47.980183