The delivery trucks of Slavin Transport Company incurred $3,600 of maintenance costs during the busiest month of 2004, in which 12,000 miles were driven collectively. During the slowest month, $2,800 in maintenance costs were incurred, and 8,000 miles were driven. Using the high-low method, what maintenance cost would the company expect to incur if 15,000 miles were driven?
A. $3,000 B. $4,400 C. $4,000 D. $4,200