Current Attempt in Progress Oriole Creations purchased 8300 feet of copper tubing at a price of $2.80 per foot and used 8000 feet during the period. The standard quantity allowed for the units produced is 7800 and the standard price of the copper tubing is $3.00 per foot. What is Oriole Creations' direct materials quantity variance for the period? O $560 unfavorable O $900 unfavorable O $600 unfavorable O $1500 unfavorable