Classify the following costs for Ford Motor Company as either a product cost or a period cost.
a. Advertising
b. Tires
c. Assembly employee wages
d. Salary of marketing executive
e. Depreciation of Dearborn, Michigan, executive building
f. CEO’s salary
g. Plant manager’s salary
h. Depreciation on Atlanta, Georgia, assembly plant
i. Maintenance supplies
j. Glass
k. Property taxes on Kansas City, Missouri, assembly plant
l. Shipping costs
m. Travel costs used by sales personnel
n. Utility costs used in executive building
o. Stamping Department employee wages
p. Steel