CREATE TABLE table_5148 ("Rider" TEXT, "Manufacturer" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

What is the sum of laps that has a time/retired that is +19.475?
SELECT SUM("Laps") FROM table_5148 WHERE "Time/Retired" = '+19.475'
SELECT SUM("Laps") FROM "table_5148" WHERE "Time/Retired" = '+19.475'