CREATE TABLE table_54515 ("Driver" TEXT, "Constructor" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

In what grid did Richard Robarts make 36 laps?
SELECT SUM("Grid") FROM table_54515 WHERE "Driver" = 'richard robarts' AND "Laps" < '36'
SELECT SUM("Grid") FROM "table_54515" WHERE "Driver" = 'richard robarts' AND "Laps" < '36'