need help which ones are wrong i keep hetting 75% on practice test?

You received partial credit in the previous attempt. 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: (c) (b) Variable Variable Direct material NA Yayable Manufacturing overhead Fixed NA INA Fixed Fixed NA 1. Tire costs incurred by Ford Motor Company Product cost 2. Sales commissions paid to the sales force of Dell Inc. Period cost 3 Wood glue consumed in the manufacture of Rooms To Go furniture (assume that the cost of glue used is insignificant) Product cost 4 Hourly wages of refinery security guards employed by ExxonMobil Period cost 5 The salary of a financial vice president of Hewlett Packard. Period cost 6. Advertising costs of Coca-Cola Period cost 7. Straight-line depreciation on factory machinery of Boeing Period cost Corporation 8. Wages of assembly-line personnel of Whirlpool Corporation Product cost 9. Delivery costs incurred by Ben & Jerry's for a shipment of Period cost their ice cream to a grocery store 10. Newsprint consumed in printing at The New York Times Period cost 11. Plant insurance costs of Texas Instruments Product cost 12. LED costs incurred in light bulb manufacturing of GE Lighting Product cost Fixed INA Direct labor NA Variable Fixed Fixed Fixed Manufacturing overhead Direct material Variable Prev 1 of 1 Next