CREATE TABLE table_54426 ("Driver" CLOB, "Constructor" CLOB, "Laps" FLOAT, "Time/Retired" CLOB, "Grid" FLOAT)

What is the total amount of grid when the laps amount was smaller than 68 and the time/retired was injection?
SELECT SUM("Grid") FROM table_54426 WHERE "Laps" < '68' AND "Time/Retired" = 'injection'
SELECT SUM("Grid") FROM "table_54426" WHERE "Laps" < '68' AND "Time/Retired" = 'injection'