Winston Company's high and low level of activity last year was 60,000 units produced in April and 20,000 units produced in December. Machine maintenance costs were $52,000 in April and $20,000 in December. Using the high-low method, estimated total maintenance cost for a month in which 40,000 units will be produced is O $40,000. O $36,000. O $34,667. O not determinable with the information given.