Listed below are various costs found in businesses. Classify each cost as a fixed or variable cost, and as a product and/or period cost. Fixed or Product or variable costs period costs A. Wages of administrative staff B. Shipping costs on merchandise sold C. Wages of workers assembling computers D. Cost of lease on factory equipment E. Insurance on factory F. Direct materials used in production of lamps G. Supervisor salary, factory H. Advertising costs I. Property taxes, factory J. Health insurance cost for company executives K. Rent on factory