please help. will thumbs up

A. Choice C B. Choice A C. Choice B D. Choice D 6. The costs of direct materials are classified as: A. Choice A B. Choice D C. Choice B D. Choice C 7. The salary paid to the president of a company would be classified on the income statement as a(n): A. direct labor cost. B. manufacturing overhead cost. C. administrative expense. D. selling expense. 8. The cost of electricity for running production equipment is classified as: A. Choice B B. Choice C C. Choice A D. Choice D 9. Product costs that have become expenses can be found in: A. cost of goods sold. B. period costs. C. selling expenses, D. administrative expenses