CREATE TABLE table_66324 ("Producer" TEXT, "Product" TEXT, "Samples taken" FLOAT, "Samples failed" FLOAT, "Melamine content ( mg/kg ) " FLOAT)

How many samples taken from producer Qingdao Suncare Nutritional Technology with a melamine content less than 53.4?
SELECT SUM("Samples taken") FROM table_66324 WHERE "Melamine content(mg/kg)" < '53.4' AND "Producer" = 'qingdao suncare nutritional technology'
SELECT SUM("Samples taken") FROM "table_66324" WHERE "Melamine content(mg/kg)" < '53.4' AND "Producer" = 'qingdao suncare nutritional technology'