Consider a disk pack with a seek time of 4 milliseconds and a rotational speed of 5000 rotations per minute (RPM). It has 400 sectors per track and each sector can store 512 bytes of data. Consider a file stored on the disk. The file contains 1000 sectors. Assume that every sector access necessitates a seek, and the average rotational latency for accessing each sector is half of the time for one complete rotation. The total time (in milliseconds) needed to read the entire file is _________.