Question $6$

$4$ pts

Students are going through a three$-$step process to obtain their ID cards. Each student will first visit the only registration desk before going to one of $6$ cashiers to pay a fee for the card. After that, he$/$she will visit one of the $5$ ID processing stations to have his$/$her picture taken and the ID card printed. Registration takes $4$ minutes. Visits to the cashier and ID processing station take $10$ and $15$ minutes, respectively.

If the bottleneck resource has the utilization of $60\%,$ what is the per hour flow rate through the process?

Round your answer to the nearest integer.