Memorial Heart Hospital provides angioplasty procedures to patients according to the following standards. Standard Quantity or Hours Standard Price or Rate Direct materials (stents) 2.40 stents per procedure $1,160 per stent Direct labor (cardiologist) 1.40 hours per procedure $240 per hour For the most recent year, the hospital reported the following actual data: Number of procedures performed 37 Number of stents purchased and used 84 Total cost of stents purchased and used $100,600 Number of direct labor hours 57 Total cost of direct labor $14,900 Compute the materials quantity variance. $3,160 Unfavorable $5,568 Favorable $5,568 Unfavorable $3,160 Favorable