Classify each of the following items of factory overhead as either a fixed or a variable cost. (Include any costs that you consider to be semivariable within the variable category. Remember that variable costs change in total as the volume of production changes.)
a. Indirect labor
b. Indirect materials
c. Insurance on building
d. Overtime premium pay
e. Depreciation on building (straight-line)
f. Polishing compounds
g. Depreciation on machinery (based on machine hours used)
h. Employer’s payroll taxes
i. Property taxes
j. Machine lubricants
k. Employees’ hospital insurance (paid by employer)
l. Labor for machine repairs
m. Vacation pay
n. Janitor’s wages
o. Rent
p. Small tools
q. Plant manager’s salary
r. Factory electricity
s. Product inspector’s wages