CREATE TABLE table_54320 ("Driver" CLOB, "Constructor" CLOB, "Laps" FLOAT, "Time/Retired" CLOB, "Grid" FLOAT)

When driver heinz-harald frentzen has a number of laps greater than 60, what is the sum of grid?
SELECT COUNT("Grid") FROM table_54320 WHERE "Laps" > '60' AND "Driver" = 'heinz-harald frentzen'
SELECT COUNT("Grid") FROM "table_54320" WHERE "Driver" = 'heinz-harald frentzen' AND "Laps" > '60'