Question 1: Choosing activity cost drivers Choose the best cost driver for each pool: Salaries of production labor supervisors: O direct labor hours O machine hours O setup hours O number of setups O number of units O number of new product designs Salaries of machine technicians (they repair the machines; on average, machines break down every 500 O direct labor hours O machine hours Osetup hours O number of setups O number of units O number of new product designs Salaries of production support staff (they set up the machines before each production batch; each setup fo setup hours): O direct labor hours O machine hours Osetup hours