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Question 3 (2 points) The Inka Company's produced 60,000 units of product on the high end in March and 20,000 units in October on the low end. Machine maintenance costs were $156,000 in March and $60,000 in October. Using the high-low method, what would be the estimate of total maintenance cost for a month in which production is expected to be 45,000 units? a) $144,000 O b) $135,000 O c) $120,000 O d) $117,000