Direct labor hours 1. Using a plantwide overhead rate based on 2,500 direct labor hours, compute the total product cost per unit for each product. 2. Consider the following additional information about these two products. If activity-based costing is used to allocate overhead cost, (a) compute overhead activity rates, (b) allocate overhead cost to Product A and Product B and compute overhead cost per unit for each, and (c) compute product cost per unit for each.