[FIN] in producing 1,000 units of product AA during this period, 6,600 kg of direct materials were purchased at a cost of $1.00 per kilogram, and 6,600 kg were used in Production. The standard quantity to use to produce an output unit was 6 kg [with the computed total standard quantity allowance [SQA] of 6,000 kg) and the standard price to pay $1.10 per kilogram. The direct materials quantity variance was Select one O a. $0. Ob. $660 favorable c. 600kg unfavorable Od. None of the listed answers is correct.