assume a company is conducting a time-driven activity-based costing study in its purchasing department. to aid the study, the company provided the following data regarding its purchasing department and three of its many jobs: number of employees 16 average annual salary per employee $ 30,000 weeks of employment per year 52 hours worked per week 40 practical capacity percentage 80% requisition processing bid evaluation inspection minutes per unit of the activity 30 15 45 job a job b job c number of requisitions processed 9 5 6 number of bid evaluations 4 3 4 number of inspections 6 2 8 what is the practice capacity of the resource supplied (in minutes)?