Bennett Companys high and low level of activity last year was 150,000 units produced in June and 50,000 units produced in January. Machine maintenance costs were $104,000 in June and $40,000 in January. Using the high-low method, estimated total maintenance cost for a month in which 100,000 units will be produced is ......

A. $69,334.

B $80,000.

C. $72,000.

D. not determinable with the information given.