Question: Question 7 A firm's variable costs include: Direct labor and materials costs. O Sales, general, and administrative (SG&A) expenses. O Interest and tax expense. Research
Question 7 A firm's variable costs include: Direct labor and materials costs. O Sales, general, and administrative (SG&A) expenses. O Interest and tax expense. Research and development (R & D) costs. O None of these answers is correct
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