CREATE TABLE table_name_48 (gold INTEGER, silver VARCHAR(255), nation VARCHAR(255), bronze VARCHAR(255), total VARCHAR(255))
What is the total Gold with a Bronze smaller than 7, a Total of 1, a Nation of cape verde, and a Silver smaller than 0?
    
SQL: SELECT SUM(gold) FROM table_name_48 WHERE bronze < 7 AND total = 1 AND nation = "cape verde" AND silver < 0