19. Setting up a machine to change from producing one product to another is an example of a: A. Unit-level activity. B. Batch-level activity. C. Product-level activity. D. Organization-sustaining activity. 20. Which of the following would probably be the most accurate measure of activity to use for allocating the costs associated with a factory's purchasing department? A. Machine-hours B. Direct labor-hours C. Number of orders processed D. Cost of materials purchased