CREATE TABLE table_54968 ("Rider" TEXT, "Bike" TEXT, "Laps" FLOAT, "Time" TEXT, "Grid" FLOAT)

What is the grid number for troy corser with under 22 laps?
SELECT SUM("Grid") FROM table_54968 WHERE "Rider" = 'troy corser' AND "Laps" < '22'
SELECT SUM("Grid") FROM "table_54968" WHERE "Laps" < '22' AND "Rider" = 'troy corser'