Ferric Chemicals, Inc. has fixed costs of $30,000 per month. The highest production volume during the year was in January when 100,000 units were produced, 75,000 units were sold, and total costs of $640,000 were incurred. In June, the company produced only 60,000 units. What was the total cost incurred in June? (Round any intermediate calculations to the nearest cent and your final answer to the nearest dollar.)

A. $366,000

B. $396,000

C. $640,000

D. $670,000