CREATE TABLE table_56259 ("Driver" TEXT, "Constructor" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

What is the grid for Jack Brabham with more than 65 laps?
SELECT SUM("Grid") FROM table_56259 WHERE "Driver" = 'jack brabham' AND "Laps" > '65'
SELECT SUM("Grid") FROM "table_56259" WHERE "Driver" = 'jack brabham' AND "Laps" > '65'