Required: Evaluate each of the following costs and determine whether the cost is (a) a product cost or a period cost, (b) variable or fixed in terms of behavior, and (c) for the product costs only, whether the cost is properly classified as direct material, direct labor, or manufacturing overhead. For each period cost select NA for column (c) Consider the following costs that were incurred during the current year. 1 Tire costs incurred by Ford Motor Company 2 Sales commissions paid to the sales force of Dell Inc 3. 4. 5 Wood glue consumed in the manufacture of Rooms To Go furniture (assume that the cost of glue used is insignificant) Hourly wages of refinery security guards employed by ExxonMobil The salary of a financial vice president of Hewlett Packard. 6 Advertising costs of Coca-Cola. 7 Straight-line depreciation on factory machinery of Boeing Corporation 8. Wages of assembly-line personnel of Whirlpool Corporation. 9 Delivery costs incurred by Ben & Jerry's for a shipment of their ice cream to a grocery store 10 Newsprint consumed in printing at The New York Times 11 Plant insurance costs of Texas Instruments. 12 LED costs incurred in light-bulb manufacturing of GE Lighting. (a) (b) (c) Product cost Variable Direct material