Cox Company's direct material costs for the month of January were as follows: Actual quantity purchased 18,000 kilograms Actual unit purchase price Materials price variance--unfavourable (based on purchases) Standard quantity allowed for actual production Actual quantity used $3.60 per kilogram $3,600 16,000 kilograms 15,000 kilograms For January there was a favourable direct material quantity variance of? $3,375. $3,400. $3,800. $3,360.