Reynoso Corporation manufactures titanium and aluminum tennis racquets. Reynoso's following total overhead costs consist of assembly costs and inspection costs. The following information is available: Reynoso is considering switching from one overhead rate based on labor hours to activity-based costing. Using activity-based costing, how much assembly cost is assigned to titanium racquets? a. $21,000. b. $30,000. c. $31, 500. d. $42,000