Arcadia Company, who manufactures recreational vehicles, incurred the following costs during the current year. Required: Classify each cost as a product cost or a period cost. 4 V Company receptionist. Advertising cost. Conference for marketing personnel. D Factory security guards. Cost of shipping vehicles to customers. Assembly line workers. Factory supervisor's salary. Wages of general office personnel. Cost of tires for vehicles. Research and development. 1. Product cost. 2. Period cost.