Answer: See explanation
Step-by-step explanation:
a. Determine the total amount of payroll checks and purchase requisitions processed per year by the company and each division.
The solution has been attached.
b. Residential's service department charge is (higher) than the other two divisions because Residential is a (heavy) user of service department services. Residential has many employees on a weekly payroll, which translates into a (larger) number of payroll transactions.