5.72 Ozark Company's high and low level of activity last year was 62.500 units of product produced in June and 25.000 units produced in October. Machine maintenance costs were $150,000 in June and 567 500 in October. Using the high-low met determine an estimate of total maintenance cost for a month in which production is expected to be 45.000 units. $121.500 $111.500 $108.000 $130.250