<human>: Can you succinctly summarize the text in 1-3 sentences?

Background: I work at a help desk for a software company. I've had this job for about 6 months. After the first month, they surprised us by forcing a few of us (me being one of them) to take a non-standard, 4 days-a-week 11am-10pm shift. Part of this shift involves grabbing support tickets from the more "difficult" support queue, a role normally accomplished during the day by the next level up from this position. There's about 30 or so people working on the help desk. So, the entry level job (Help Desk I) pays about $5000-$7000 *less* per year than the next level (Help Desk II) job. BUT, with my shift, I'm basically doing half the Help Desk I job and half the Help Desk II job, simply because I'm there alone for much of the day and have to take cases from both of the queues.

I'm not sure why they don't offer an in-between salary for the people who work my shift - according to the research I've done, most companies do offer more pay for this shift as it's seen as less desirable and there's more responsibility involved.

Of the few people who were put on this shift, one has already quit and one is on their way out. I'm doing pretty well and I think my managers recognize that. Because of that, I feel like I have some leverage in terms of asking for a raise. I'm 22, though, and have never done this before. The management here is not exactly understanding (an understatement) and I'm worried that handling this the wrong way will negatively affect my relationships with management.

My current plan is to come prepared with as much data and supporting evidence as I can - my case count compared to people working normal day shifts, the number of Tier 2 cases I take, possibly salary data for "day/swing/night" shifts for similar positions. I'm hoping for a 3-5% raise.

Any advice on how to handle this tactfully? I appreciate the help.
<bot>: Got forced into a shift that has more work, responsibility than regular day shift but does not pay any more. Coworkers on this shift quit. I've been pretty successful so far. Want to ask for a small raise.