Use this information to answer the question that follow. The following data relate to direct materials costs for February: Materials cost per yard: standard, $1.92; actual, $2.05 Standard yards per unit: standard, 4.71 yards; actual, 5.09 yards Units of production: 9,000 Calculate the direct materials quantity variance. Oa. $7,011.00 unfavorable Ob. $6,566.40 favorable Oc. $7,011.00 favorable Od. $6,566.40 unfavorable