Lewis and Stark is a public accounting firm that offers two primary services, auditing and tax-return preparation. A controversy has developed between the partners of the to who service lines as to who is contributing the greater amount to the bottom line. The area of contention is the assignment of overhead. The tax partners argue for assigning overhead on the basis of 40% of direct labor dollars, while the audit partners argue for implementing activity-based costing. The partners agree to use next year's budgeted data for purposes of analysis and comparison. The following overhead data are collected to develop the comparison. Using traditional product costing as proposed by the tax partners, compute the total overhead cost assigned to both services (audit and tax) of Lewis and Stark. Using activity-based costing, prepare a schedule showing the computations of the activity-based overhead rates (per cost driver)