Why is option a correct?

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Why is option d correct?

TIA

Wages paid to factory machine operators in producing the dog houses should be categorized as: Multiple Choice a product cost and recorded on the income statement a product cost and recorded in the inventory account a period cost and recorded on the income statement a period cost and recorded in the inventory account A chair manufacturer makes custom chairs using hand tools, wood, glue, and varnish. Which of the following statements is true? Multiple Choice The costs of wood and glue would be treated as direct costs. Wood, glue, and varnish would all be direct materials. The concepts of direct and indirect costs are not appilcable here. Wood would be accounted for as a direct cost, and glue and varnish as indirect costs