Classify each cost as being either variable or fixed with respect to the number of units produced and sold. Also classify each cost as either a selling and administrative cost or a product cost. Hamburger buns in a Wendy's outlet. Advertising by a dental office. Apples processed and canned by Del Monte. Shipping canned apples from a Del Monte plant to customers. Insurance on a Bausch & Lomb factory producing contact lenses. Insurance on IBM's corporate headquarters. Salary of a supervisor overseeing production of printers at Hewlett-Packard. Commissions paid to automobile salespersons. Depreciation of factory lunchroom facilities at a General Electric plant. Steering wheels installed in BMWs