In months 1 and 2, a company's total selling expense was $64,000 and $80,000, respectively, at sales volumes of 8,000 and 12,000 units, respectively. Using the high-low method, what is the company's estimated selling expense in month 3 if it plans to sell 11,000 units?

A. $66,000 B. $70,000 C. $76,000 D. $78,000

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