The standards to produce one unit of FaEzzy are shown below. Direct material (in ounces) Direct labor Quantity Price Per unit 8 $1.15 $9.20 0.8 $16.00 $12.80 Manufacturing overhead (apply on machine hours) 2.5 $0.10 $0.25 Total standard cost per unit $22.25 The company actually produced 4,500 units. The actual number of machine hours used was 10,500 hours. The actual cost of manufacturing overhead was $1,575. What is the manufacturing overhead rate variance? $525 U $1,050 U O $1,050 F $525 F