Serva, Inc., manufactures and sells two products: Product R4 and Product N4. Data concerning the expected production of each product and the expected total direct labor-hours (DLHs) required to produce that output appear below: The direct labor rate is $24.70 per DLH. The direct materials cost per unit for each product is given below: The company is considering adopting an activity-based costing system with the following activity cost pools, activity measures, and expected activity: The activity rate for the Labor-Related activity cost pool under activity-based costing is closest to