One Stop is trying to improve registering for classes and surveys $1,500$ students. They find the following quality issues and want to consider the dpmo's.

system is down or lags on heavy traffic days

drop down menus are cumbersome

hitting the "back" button removes your selected choices

multiple security DUO logins during the process

During a $1$ week survey period, they find $27$ complaints from these specific areas. What is the dpmo of this process?

The dpmo $=4,500$

The dpmo $=0\mathrm{.}018$

The dpmo$=6,428$

The dpmo $=0\mathrm{.}0045$

The dpmo $=2,500$