The Sit-N-Spin Corporation manufactures and assembles office chairs. Sit-N-Spin uses an activity- based costing system to allocate all manufacturing conversion costs. Each chair consists of 15 separate parts totaling $125 in direct materials, and requires 2.0 hours of machine time to produce. Additional information follows: Activity Materials handling Machining Allocation Base Cost Allocation Rate Number of parts $1.75 per part $2.00 per machine Machine hours hour Number of parts $0.50 per part Number of finished units $2.75 per finished unit Assembling Packaging What is the number of finished office chairs? 250 O 100 20 Cannot be determined from the information given