Answer:
In identifying a cost driver one should consider the extent to which a cost or a pool of costs varies in accordance with the cost driver. The higher the correlation between cost and the cost driver the more accurate will be the resulting of the understanding of cost behaviour.
Support Department Cost Driver/Cost drivers
a. Accounts Receivable / Number of sales invoices
b. Central Purchasing /Number of purchase requisitions
c. Computer Support /Number of computers
d. Conferences /Number of conference attendees
e. Employee Travel / Number of travel claims
f. Payroll Accounting /Number of payroll checks
g. Telecommunications /Number of cell phone minutes used
h. Training /Number of employees trained