"Professor’s Office" What does the professor mean when she says this:

[Narrator] Listen to part of a conversation on campus between a student and a professor.
[Student] Hi. I’m Ron Watson. I’m here to apply for the work-study job.  Q18
[Professor] Oh, good. Um, have you ever had a work-study position?
[Student] Not really. To tell the truth, I’m not exactly sure how it works.
[Professor] Well, it’s like this: on work-study, you have regular hours and assigned responsibilities,
but, if you get everything done, you can study. You can’t leave because there may be
something else to do later, during your hours. But you should always bring your books
and, oh, I’d guess that probably about 25 percent of the time, you should be able to
study.
[Student] This is even better than I thought. What kind of assignments would I have, I mean, if I  Q19
get this opportunity.
[Professor] Clerical mostly, I’m afraid. Nothing too demanding, but it isn’t the most interesting work
ether. Filing, copying, delivering mail, uh, some grading, but only multiple-choice tests,
and we use a grading machine for that.
[Student] Would someone show me how to operate the grading machine? I’m sure I could do it if
someone showed me once or twice.
[Professor] No problem. We have a secretary here in the department, and she’ll be the main person
you’d report to. She’d show you how to do everything.
[Student] Okay. Great.
[Professor] Now, let’s see whether your hours will fit in with the hours we need. Could you work
Monday through Thursday from ten to two?
[Student] That’s sixteen hours a week?
[Professor] To start. We may actually want to extend that to Fridays, so, if that happens, it would be
twenty hours. You’ll notice that the hours include the usual lunch break. That would let
Nancy... she’s the secretary... so she could get you started on the work, and then
take her lunch from noon to one, and be back for the last hour of your day, in case you
had any questions.
[Student] Okay.
[Professor] Oh, and I should tell you about the phone. While Nancy’s gone for lunch, we’ll want you
to answer the phone.
[Student] Sure. I can do that. Uh, will there be any work on the computer? I’m familiar with most  Q20
of the basic office programs. I used to help my Dad in his office when I was in high
school. He’s a lawyer.
[Professor] Oh. Well, we hadn’t planned to include anything like that in the job, but it’s a plus.
[Student] Sorry to ask, but ... how does the pay work? Do I get paid for the time I work minus
the study time or...
[Professor] Oh no. You get paid for sixteen hours a week whether you’re working or studying. This  Q21
is a special program for students.
[Student] It seems too good to be true.
[Professor] Well, you need to have an interview with Nancy. Since you’ll be working closely with
her, she’ll make the final decision.
[Student] Okay. Should I make an appointment or...
[Professor] No. Just go over to her desk and tell her who you are. She’s expecting you. We want to
get the position filled as soon as possible.
[Student] Well, thank you for seeing me. I hope I’ll be working here.
[Professor] Good luck.... Oh, yes, be sure to tell Nancy about the computer experience.  Q22
[Student] I will.
[Professor] And let her know I’ve already interviewed you, and I referred you to her.
[Student] Thanks again. I really appreciate your taking the time to explain everything to me.
[Professor] You’re welcome.