Strawberry Mansion Company reported the following: Line Item DescriptionNumerical DataStandard quantity per unit3 lbs.Standard price per pound$2.70Actual pounds used14,400 lbs.Actual price per pound$3.00Number of units produced4,700 What is the direct materials quantity variance? a. $900 unfavorable b. $(810) favorable c. $810 unfavorable d. $(900) favorable