Jennifer Company has two products: A and B. The company uses activity-based costing. The estimated total cost and expected activity for each of the company's three activity cost pools are as follows: Expected Activity Estimated Overhead Cont $23, 500 $18,000 $34,600 Activity Cost Poola Product design Assembling Supporting customers 400 Product Product B 100 500 200 600 300 Total 500 700 900 The activity rate under the activity-based costing system for Supporting customers is closest to