17. Activity-based costing (ABC) a. can be used only in a process cost system. b. focuses on units of production. c. focuses on activities performed to produce a product. d. uses only a single basis of allocation. 18. The following activity is value-added: a. Storage of raw materials b. Shaping a piece of metal on a lathe c. Moving parts from machine to machine d. All of the above. 19. The first step in activity-based costing is to a. assign manufacturing overhead costs for each activity cost pool to products. b. calculate the activity-based overhead rate per cost driver. c. identify and classify the major activities involved in the manufacture of specific products. d. identify the cost driver that has a strong correlation to the activity cost pool.