Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_66324 ( "Producer" text, "Product" text, "Samples taken" real, "Samples failed" real, "Melamine content(mg/kg)" real )

### Question ###
How many samples taken from producer Qingdao Suncare Nutritional Technology with a melamine content less than 53.4?

### Accurate SQL ###

SELECT SUM("Samples taken") FROM table_66324 WHERE "Melamine content(mg/kg)" < '53.4' AND "Producer" = 'qingdao suncare nutritional technology'