Seth Company manufactures financial calculators. Which ONE of the following is NOT a PERIOD cost?

Property taxes on the executive office building

Depreciation on the automobiles used by the company salespersons

Cost of the electricity used in the executive officers copy room

Wages of the janitors in the executive office building

Salary of the chief financial officer

Bonuses paid to the calculator assemblers who work on the production line

Wages paid to typesetters in the companys advertising department

Commissions paid to company salespersons