CREATE TABLE table_54516 ("Driver" CLOB, "Constructor" CLOB, "Laps" FLOAT, "Time/Retired" CLOB, "Grid" FLOAT)

How many laps were completed in grid 18?
SELECT SUM("Laps") FROM table_54516 WHERE "Grid" = '18'
SELECT SUM("Laps") FROM "table_54516" WHERE "Grid" = '18'